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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 copy(self):
 """ Make a hard copy of `self`. :return: A new LiveDefinition instance. :rtype: angr.analyses.ddg.LiveDefinitions """


        ld = LiveDefinitions()
        ld._memory_map = self._memory_map.copy()
        ld._register_map = self._register_map.copy()
        ld._defs = self._defs.copy()

        return ld