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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 record(self):
        # type: () -> bytes
        '''
        A method to generate the string representing this UDF NSR Volume
        Structure.

        Parameters:
         None.
        Returns:
         A string representing this UDF BEA Volume Strucutre.
        '''
        if not self._initialized:
            raise pycdlibexception.PyCdlibInternalError('UDF NSR Volume Structure not initialized')
        return struct.pack(self.FMT, 0, self.standard_ident, 1, b'\x00' * 2041)