Looks up a child property of the element.
prop_name can either be in the format "prop-name" or "TypeName:GESTimelineElement:prop-name", where "prop-name"
is the name of the property to look up (as used in @get), and
"TypeName" is the type name of the child (as returned by G_OBJECT_TYPE_NAME). The latter format is useful when two children
of different types share the same property name.
The first child found with the given "prop-name" property that was registered with
add_child_property (and of the type "TypeName", if it was given)
will be passed to child, and the registered specification of this property will be passed to pspec.
| this | |
| prop_name |
The name of a child property |
| child |
The return location for the found child |
| pspec |
The return location for the specification of the child property |
|
true if a child corresponding to the property was found, in which case |