@staticmethod
def equal(coll1, coll2):
    """
        Test to see if instances are the *same instance*.

        Parameters
        ----------
        coll1 : Collection
            A collection.
        coll2 : Collection
            Another collection.

        Returns
        -------
        bool
            True if same instance.
        """
    return bool(coll1._type is coll2._type and coll1._event_list is coll2.
        _event_list)
