... gimp_dialog_set_alternative_button_order_from_array()
Macros are not introspectable, which means this call would not be
available for non-C plug-ins. Also adding a "Since: 3.0" since these
macros were added in commit 3be0d13b.

Note that I don't do the same for the macro
gimp_dialog_set_alternative_button_order() because varargs functions
won't be introspected anyway. So this one can just stay a macro for C
plug-ins only.