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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 resize_for_flows(self):
 """Extend `unamey` and `fnamey` for bus injections and line flows"""

        if self.system.config.dime_enable:
            self.system.tds.config.compute_flows = True

        if self.system.tds.config.compute_flows:
            nflows = 2 * self.system.Bus.n + \
                     8 * self.system.Line.n + \
                     2 * self.system.Area.n_combination
            self.unamey.extend([''] * nflows)
            self.fnamey.extend([''] * nflows)