def __init__(builder, stepId, args):
    """Create the Command. 'builder' is a reference to the parent
        buildbot_worker.base.WorkerForBuilderBase instance, which will be
        used to send status updates (by calling builder.sendStatus).
        'stepId' is a random string which helps correlate worker logs with
        the master. 'args' is a dict of arguments that comes from the
        master-side BuildStep, with contents that are specific to the
        individual Command subclass.

        This method is not intended to be subclassed."""
