def get_memory(self):
        """
        **Overview**:
            Access the memory of GTrXL.
        """
        # Get the memory of GTrXL.
        if self.memory is None:
            return None
        else:
            return self.memory.get()

        **Overview**:
            Access the memory of GTrXL.
        
chapter5_time/gtrxl.py