Calls the provided function once for each field in the #GstStructure. In
contrast to gst.structure.Structure.foreach_, the function may modify the fields.
In contrast to gst.structure.Structure.mapInPlace, 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.Structure.foreach_, the function may modify the fields. In contrast to gst.structure.Structure.mapInPlace, the field is removed from the structure if false is returned from the function. The structure must be mutable.