@staticmethod<EOL><INDENT>def _bigger(interval1, interval2):<DEDENT>
if interval2.cardinality > interval1.cardinality:<EOL><INDENT>return interval2.copy()<EOL><DEDENT>return interval1.copy()<EOL>
Return interval with bigger cardinality
Refer Section 3.1

:param interval1: first interval
:param interval2: second interval
:return: Interval or interval2 whichever has greater cardinality