Calls the provided function once for each field in the #GstStructure. In
contrast to gst_structure_foreach(), the function may modify the fields.
In contrast to gst_structure_map_in_place(), the field is removed from
the structure if %FALSE is returned from the function.
The structure must be mutable.
Calls the provided function once for each field in the #GstStructure. In contrast to gst_structure_foreach(), the function may modify the fields. In contrast to gst_structure_map_in_place(), the field is removed from the structure if %FALSE is returned from the function. The structure must be mutable.