Calls the provided function once for each structure and caps feature in the #GstCaps. In contrast to gst.caps.Caps.foreach_, the function may modify but not delete the structures and features. The caps must be mutable.
a function to call for each field
true if the supplied function returns true for each call, false otherwise.
Calls the provided function once for each structure and caps feature in the #GstCaps. In contrast to gst.caps.Caps.foreach_, the function may modify but not delete the structures and features. The caps must be mutable.