lookup

Lookups a reference to one of the objects in the this.

The generated reference must be freed with unref.

The gtype must match the type of the object in the odb; the method will fail otherwise. The special value g_type_none may be passed to let the method guess the object's type.

Parameters:

this	a Repository.
oid	a OId.
gtype	a Type.

Returns:

the found Object, or null on error.