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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_all(self):
 """ Gets all component references registered in this reference map. :return: a list with component references. """

        components = []
        
        self._lock.acquire()
        try:
            for reference in self._references:
                components.append(reference.get_component())
        finally:
            self._lock.release()

        return components