gtk_type_foreach?

[johannes nada kth se (Johannes Keukelaar)]

Hi *,

Is there any reason why there is no gtk_type_foreach function? Something that 
would call g_hash_table_foreach on type_name_2_type_ht in gtktypeutils.c with a 
user-supplied function and gpointer data? This would greatly simplify 
dynamically type-extensible systems, allowing them to find out which types 
exist that are derived from some basic type, for example. (Say, to construct an 
add-a-new-node menu dynamically.)

If there is no such reason (apart from that nobody ever needed one), I'll 
volunteer to write one for gtk+1.0.4/5.

Regards,

Johannes.
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