c_gtk_builder_cscope_add_callback_symbols

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)
void function(GtkBuilderCScope* self, const(char)* firstCallbackName, GCallback firstCallbackSymbol, ...) c_gtk_builder_cscope_add_callback_symbols;

Meta