c_gtk_icon_theme_load_surface

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
cairo_surface_t* function(GtkIconTheme* iconTheme, gchar* iconName, gint size, gint scale, GdkWindow* forWindow, GtkIconLookupFlags flags, GError** error) c_gtk_icon_theme_load_surface;

Meta