@classmethod
def _parse_value(cls, stream_rdr, offset, value_count, value_offset):
    """
        Return the long int value contained in the *value_offset* field of
        this entry. Only supports single values at present.
        """
    if value_count == 1:
        return stream_rdr.read_long(offset, 8)
    else:
        return 'Multi-value long integer NOT IMPLEMENTED'
