Fix reference to _declarative_constructor in docstring
Fix reference to _declarative_constructor in docstring
wujuguang/sqlalchemy,sqlalchemy/sqlalchemy,monetate/sqlalchemy,j5int/sqlalchemy,zzzeek/sqlalchemy,robin900/sqlalchemy,j5int/sqlalchemy,graingert/sqlalchemy,graingert/sqlalchemy,wujuguang/sqlalchemy,robin900/sqlalchemy,monetate/sqlalchemy