'Add some noise to the delay, so sleeps aren\'t exactly the same across
all processes.
:param delay_seconds: How many seconds to sleep approximately.
:return: ``_Sleep`` with jitter added.'

@classmethod
def with_jitter(cls, delay_seconds):

    jitter = (1 + uniform((-0.2), 0.2))
    return cls(delay_seconds=(delay_seconds * jitter))
