Function Macro
GObjectTYPE_CHECK_INSTANCE_CAST
since: 2.0
Description
Checks that instance is an instance of the type identified by g_type
and issues a warning if this is not the case. Returns instance casted
to a pointer to c_type.
No warning will be issued if instance is NULL, and NULL will be returned.
This macro should only be used in type implementations.
Available since: 2.0
This function is not directly available to language bindings.