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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 _get_from_known_locations(self):
 """ Retrieves the first existing Java library path in the predefined known locations :return: The path to the JVM library, or None """

        for home in self.find_possible_homes(self._locations):
            jvm = self.find_libjvm(home)
            if jvm is not None:
                return jvm