code: def _get_from_known_locations(self):
          
          for home in self.find_possible_homes(self._locations):
              jvm = self.find_libjvm(home)
              if jvm is not None:
                  return jvm
docs: Retrieves the first existing Java library path in the predefined known
          locations
  
          :return: The path to the JVM library, or None