Sets the marshaller of closure. The marshal_data
of marshal provides a way for a meta marshaller to provide additional
information to the marshaller. (See Closure.setMetaMarshal.) For
GObject's C predefined marshallers (the g_cclosure_marshal_*()
functions), what it provides is a callback function to use instead of
closure->callback.
Sets the marshaller of closure. The marshal_data of marshal provides a way for a meta marshaller to provide additional information to the marshaller. (See Closure.setMetaMarshal.) For GObject's C predefined marshallers (the g_cclosure_marshal_*() functions), what it provides is a callback function to use instead of closure->callback.