__hash__ in cindex.py Cursor class?

Hi,
the Cursor class has a hash property, but no __hash__ method.
Is this because the Cursor class is not "hashable" (immutable, objects which compare equal must have the same hash value)?

Currently, I'm using this wrapper class, which seems to work:

class HashedCursor:
    def __init__(self, cursor):
        self.cursor = cursor
    def __eq__(self, other):
        return self.cursor == other.cursor
    def __hash__(self):
        return self.cursor.hash

regards,
Sebastian