added wxXmlResource::FindXRCIDById() (#10026)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56303 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/xrc/xmlres.h

@@ -108,6 +108,20 @@ public:
     */
     int CompareVersion(int major, int minor, int release, int revision) const;
 
+    /**
+        Returns a string ID corresponding to the given numeric ID.
+
+        The string returned is such that calling GetXRCID() with it as
+        parameter yields @a numId. If there is no string identifier
+        corresponding to the given numeric one, an empty string is returned.
+
+        Notice that, unlike GetXRCID(), this function is slow as it checks all
+        of the identifiers used in XRC.
+
+        @since 2.9.0
+     */
+    static wxString wxXmlResource::FindXRCIDById(int numId);
+
     /**
         Gets the global resources object or creates one if none exists.
     */