'Override `StateWS.no_match` to generate a system message.
This code should never be run.'

def no_match(self, context, transitions):

    self.reporter.severe(('Internal    error:    no    transition    pattern    match.        State:    "%s";    transitions:    %s;    context:    %s;    current    line:    %r.' % (self.__class__.__name__, transitions, context, self.state_machine.line)), line=self.state_machine.abs_line_number())
    return (context, None, [])
