@property<EOL><INDENT>def end(self):<DEDENT>
if self.item is None:<EOL><INDENT>return self._end<EOL><DEDENT>else:<EOL><INDENT>if self._end != self.item.end:<EOL><INDENT>raise IndexError("<STR_LIT>" +<EOL>"<STR_LIT>")<EOL><DEDENT>return self.item.end<EOL><DEDENT>
:return: the genomic end of this alignment block in ref seq.