In that case, annotating the actual type will help bindings use the correct type.

Compared the gir before and after, and types were more specific:
--- Pidgin-3.0.gir  2025-02-14 01:13:40.813791641 -0500
+++ build/pidgin/Pidgin-3.0.gir 2025-02-14 03:05:58.968098262 -0500
@@ -54,8 +54,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginabout.h"
-               line="58">A new instance of the about dialog.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="58">The new about dialog.</doc>
+          <type name="AboutDialog" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="application"
@@ -100,12 +100,13 @@
         <doc xml:space="preserve"
              filename="pidgin/pidginaccountchooser.h"
              line="52">Creates a combo box filled with accounts.</doc>
-        <source-position filename="pidgin/pidginaccountchooser.h" line="62"/>
+        <source-position filename="pidgin/pidginaccountchooser.h" line="63"/>
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginaccountchooser.h"
-               line="57">The account chooser combo box.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="57">The new account
+         chooser combo box.</doc>
+          <type name="AccountChooser" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
       <method name="get_filter"
@@ -258,12 +259,13 @@
         <doc xml:space="preserve"
              filename="pidgin/pidginaccountdisplay.h"
              line="52">Creates a display for an account.</doc>
-        <source-position filename="pidgin/pidginaccountdisplay.h" line="63"/>
+        <source-position filename="pidgin/pidginaccountdisplay.h" line="64"/>
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginaccountdisplay.h"
-               line="58">The account display.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="58">The new account
+         display.</doc>
+          <type name="AccountDisplay" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="account" transfer-ownership="none">
@@ -371,8 +373,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginaccounteditor.h"
-               line="61">The new instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="61">The new account editor.</doc>
+          <type name="AccountEditor" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="account"
@@ -542,8 +544,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginaccountfilterconnected.h"
-               line="60">The new #PidginAccountFilterConnected instance.</doc>
-          <type name="Gtk.Filter" c:type="GtkFilter*"/>
+               line="60">The new filter.</doc>
+          <type name="AccountFilterConnected" c:type="GtkFilter*"/>
         </return-value>
       </constructor>
     </class>
@@ -585,8 +587,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginaccountfilterprotocol.h"
-               line="61">The new #PidginAccountFilterProtocol instance.</doc>
-          <type name="Gtk.Filter" c:type="GtkFilter*"/>
+               line="61">The new filter.</doc>
+          <type name="AccountFilterProtocol" c:type="GtkFilter*"/>
         </return-value>
         <parameters>
           <parameter name="protocol_id" transfer-ownership="none">
@@ -673,7 +675,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginaccountmanager.h"
                line="58">The dialog.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="AccountManager" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="application"
@@ -770,7 +772,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginaccountmanagerrow.h"
                line="58">The new account row.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="AccountManagerRow" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="account"
@@ -887,7 +889,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginaccountrow.h"
                line="62">The new instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="AccountRow" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
       <method name="get_account"
@@ -1056,8 +1058,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginaccountsdisabledmenu.h"
-               line="60">The new menu instance.</doc>
-          <type name="Gio.MenuModel" c:type="GMenuModel*"/>
+               line="60">The new instance.</doc>
+          <type name="AccountsDisabledMenu" c:type="GMenuModel*"/>
         </return-value>
       </constructor>
     </class>
@@ -1097,8 +1099,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginaccountsenabledmenu.h"
-               line="60">The new menu instance.</doc>
-          <type name="Gio.MenuModel" c:type="GMenuModel*"/>
+               line="60">The new instance.</doc>
+          <type name="AccountsEnabledMenu" c:type="GMenuModel*"/>
         </return-value>
       </constructor>
     </class>
@@ -1137,8 +1139,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginapplication.h"
-               line="59">The new #PidginApplication instance.</doc>
-          <type name="Gio.Application" c:type="GApplication*"/>
+               line="59">The new instance.</doc>
+          <type name="Application" c:type="GApplication*"/>
         </return-value>
       </constructor>
       <method name="add_action_group"
@@ -1237,8 +1239,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginautoadjustment.h"
-               line="61">The new #PidginAutoAdjustment instance.</doc>
-          <type name="Gtk.Adjustment" c:type="GtkAdjustment*"/>
+               line="61">The new instance.</doc>
+          <type name="AutoAdjustment" c:type="GtkAdjustment*"/>
         </return-value>
       </constructor>
       <method name="decrement"
@@ -1314,8 +1316,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginavatar.h"
-               line="59">The new #PidginAvatar instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="59">The new instance.</doc>
+          <type name="Avatar" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
       <method name="get_animate"
@@ -1544,8 +1546,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/prefs/pidginawayprefs.h"
-               line="58">The new #PidginAwayPrefs instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="58">The new instance.</doc>
+          <type name="AwayPrefs" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
     </class>
@@ -1583,7 +1585,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginbadges.h"
                line="59">The new widget.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="Badges" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="badges" transfer-ownership="none">
@@ -1696,8 +1698,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginchanneljoindialog.h"
-               line="56">The widget.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="56">The new widget.</doc>
+          <type name="ChannelJoinDialog" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="application"
@@ -1750,8 +1752,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidgincontactlist.h"
-               line="62">The new #PidginContactList instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="62">The new instance.</doc>
+          <type name="ContactList" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
     </class>
@@ -1791,7 +1793,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginconversation.h"
                line="62">The new widget.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="Conversation" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="conversation" transfer-ownership="none">
@@ -1914,12 +1916,13 @@
              filename="pidgin/pidginconversationmember.h"
              line="52">Creates a display for a conversation member.</doc>
         <source-position filename="pidgin/pidginconversationmember.h"
-                         line="63"/>
+                         line="64"/>
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginconversationmember.h"
-               line="58">The conversation member display.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="58">The conversation
+         member display.</doc>
+          <type name="ConversationMember" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="conversation_member" transfer-ownership="none">
@@ -2033,8 +2036,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/prefs/pidginconversationprefs.h"
-               line="58">The new #PidginConversationPrefs instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="58">The new instance.</doc>
+          <type name="ConversationPrefs" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
     </class>
@@ -2077,8 +2080,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/prefs/pidgincredentialprefs.h"
-               line="66">The new #PidginCredentialPrefs instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="66">The new instance.</doc>
+          <type name="CredentialPrefs" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
     </class>
@@ -2116,20 +2119,21 @@
                    version="3.0">
         <doc xml:space="preserve"
              filename="pidgin/prefs/pidgincredentialproviderrow.h"
-             line="63">Creates a new #PidginCredentialProviderRow instance.</doc>
+             line="65">Creates a new #PidginCredentialProviderRow instance.</doc>
         <source-position filename="pidgin/prefs/pidgincredentialproviderrow.h"
-                         line="74"/>
+                         line="77"/>
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/prefs/pidgincredentialproviderrow.h"
-               line="69">The new #PidginCredentialProviderRow instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="71">The new
+         instance.</doc>
+          <type name="CredentialProviderRow" c:type="GtkWidget*"/>
         </return-value>
@@ -2835,8 +2839,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidgindisplaywindow.h"
-               line="60">The new #PidginDisplayWindow instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="60">The new instance.</doc>
+          <type name="DisplayWindow" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="application"
@@ -3163,8 +3167,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidgininfopane.h"
-               line="60">The new #PidginInfoPane instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="60">The new instance.</doc>
+          <type name="InfoPane" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
       <method name="get_child"
@@ -3395,7 +3399,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginkeypad.h"
                line="57">The new instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="Keypad" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
       <method name="set_key_capture_widget"
@@ -3478,7 +3482,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginmessage.h"
                line="59">The new instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="Message" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="message"
@@ -3586,8 +3590,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/prefs/pidginnetworkprefs.h"
-               line="58">The new #PidginNetworkPrefs instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="58">The new instance.</doc>
+          <type name="NetworkPrefs" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
     </class>
@@ -3735,7 +3739,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginnotification.h"
                line="74">The new instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="Notification" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="notification" transfer-ownership="none">
@@ -3885,9 +3889,9 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginnotificationaddcontact.h"
-               line="66">The new #PidginNotificationAddContact
+               line="66">The new
          instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="NotificationAddContact" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="notification" transfer-ownership="none">
@@ -3941,9 +3945,9 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginnotificationauthorizationrequest.h"
-               line="66">The new #PidginNotificationAuthorizationRequest
-         instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="66">The
+         new instance.</doc>
+          <type name="NotificationAuthorizationRequest" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="notification" transfer-ownership="none">
@@ -4006,12 +4010,13 @@
              line="60">Creates a new #PidginNotificationConnectionError instance that will display
 @notification.</doc>
         <source-position filename="pidgin/pidginnotificationconnectionerror.h"
-                         line="72"/>
+                         line="73"/>
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginnotificationconnectionerror.h"
-               line="67">The new instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="67">The new
+         instance.</doc>
+          <type name="NotificationConnectionError" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="notification" transfer-ownership="none">
@@ -4063,8 +4068,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginnotificationlink.h"
-               line="64">The new #PidginNotificationLink instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="64">The new instance.</doc>
+          <type name="NotificationLink" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="notification" transfer-ownership="none">
@@ -4114,8 +4119,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginnotificationlist.h"
-               line="59">The new #PidginNotificationList instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="59">The new instance.</doc>
+          <type name="NotificationList" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
     </class>
@@ -4161,8 +4166,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginpluginsmenu.h"
-               line="56">The new #PidginPluginsMenu instance.</doc>
-          <type name="Gio.MenuModel" c:type="GMenuModel*"/>
+               line="56">The new instance.</doc>
+          <type name="PluginsMenu" c:type="GMenuModel*"/>
         </return-value>
       </constructor>
     </class>
@@ -4232,7 +4237,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginpresenceicon.h"
                line="61">The new presence icon.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="PresenceIcon" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="presence"
@@ -4475,12 +4480,13 @@
         <doc xml:space="preserve"
              filename="pidgin/pidginprotocolchooser.h"
              line="54">Creates a drop down for a user to select a protocol from.</doc>
-        <source-position filename="pidgin/pidginprotocolchooser.h" line="64"/>
+        <source-position filename="pidgin/pidginprotocolchooser.h" line="65"/>
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/pidginprotocolchooser.h"
-               line="59">The protocol chooser drop down.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="59">The protocol chooser
+         drop down.</doc>
+          <type name="ProtocolChooser" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
       <method name="get_protocol"
@@ -4581,8 +4587,8 @@
         <return-value transfer-ownership="full">
           <doc xml:space="preserve"
                filename="pidgin/prefs/pidginproxyprefs.h"
-               line="58">The new #PidginProxyPrefs instance.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+               line="58">The new instance.</doc>
+          <type name="ProxyPrefs" c:type="GtkWidget*"/>
         </return-value>
       </constructor>
     </class>
@@ -4624,7 +4630,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidgintypinglabel.h"
                line="60">The new widget.</doc>
-          <type name="Gtk.Widget" c:type="GtkWidget*"/>
+          <type name="TypingLabel" c:type="GtkWidget*"/>
         </return-value>
         <parameters>
           <parameter name="conversation" transfer-ownership="none">
@@ -4745,7 +4751,7 @@
           <doc xml:space="preserve"
                filename="pidgin/pidginui.h"
                line="60">The new instance.</doc>
-          <type name="Purple.Ui" c:type="PurpleUi*"/>
+          <type name="Ui" c:type="PurpleUi*"/>
         </return-value>
       </constructor>
     </class>