'Initialize suppression of GO-AHEADs.
Args:
protocol (Protocol): The active protocol instance.'

def __init__(self, protocol):

    self.protocol = protocol
    self.protocol.protocol_flags['NOGOAHEAD'] = True
    self.protocol.will(SUPPRESS_GA).addCallbacks(self.do_suppress_ga, self.dont_suppress_ga)
    self.protocol.do(SUPPRESS_GA).addCallbacks(self.do_suppress_ga, self.dont_suppress_ga)
