Obtains data which has previously been attached to type with gobject.global.typeSetQdata.
Note that this does not take subtyping into account; data attached to one type with gobject.global.typeSetQdata cannot be retrieved from a subtype using gobject.global.typeGetQdata.
a #GType
a #GQuark id to identify the data
the data, or null if no data was found
Obtains data which has previously been attached to type with gobject.global.typeSetQdata.
Note that this does not take subtyping into account; data attached to one type with gobject.global.typeSetQdata cannot be retrieved from a subtype using gobject.global.typeGetQdata.