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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _is_ready(self, as_of):
 """Is the RecurringCost ready to be enacted as of the date `as_of` This determines if `as_of` precedes the start of `initial_billing_cycle`. If so, we should not be enacting this RecurringCost yet. Args: as_of (Date):
 """

        if self.is_one_off():
            return self.initial_billing_cycle.date_range.lower <= as_of
        else:
            return True