def build_label(self, ident, cls):
ident_w_label = ident + '<STR_LIT::>' + cls.__label__<EOL>self._ast['<STR_LIT>'].append('<STR_LIT>'.format(ident_w_label))<EOL>self._ast['<STR_LIT>'] = ident<EOL>self._ast['<STR_LIT>'] = cls<EOL>return ident<EOL>
match nodes by a label