@staticmethod
def dotDrawEdge(st1, st2, sep='\n'):
    """ Draw a transition in Dot Format

        :arg str st1: starting state
        :arg str st2: ending state
        :arg str sep: separator
        :rtype: str"""
    return '"{0:s}" -> "{1:s}" {3:s} '.format(st1, st2, sep)
