c_gtk_entry_completion_set_match_func

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(GtkEntryCompletion* completion, GtkEntryCompletionMatchFunc func, void* funcData, GDestroyNotify funcNotify) c_gtk_entry_completion_set_match_func;

Meta