def get_parquet_lib(cls):
        """
        Find/choose a library to read and write Parquet files
        based on installed options.
        """
        if cls.__parquet_lib is None:
            parq_env = os.environ.get('QUILT_PARQUET_LIBRARY', ParquetLib.ARROW.value)
            cls.__parquet_lib = ParquetLib(parq_env)
        return cls.__parquet_lib
Find/choose a library to read and write Parquet files
        based on installed options.