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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 is_associated_file(self):
        # type: () -> bool
        '''
        A method to determine whether this file is 'associated' with another file
        on the ISO.

        Parameters:
         None.
        Returns:
         True if this file is associated with another file on the ISO, False
         otherwise.
        '''
        if not self._initialized:
            raise pycdlibexception.PyCdlibInternalError('Directory Record not yet initialized')

        return self.file_flags & (1 << self.FILE_FLAG_ASSOCIATED_FILE_BIT)