Added a visitList() method to make writing visitChildren() methods easier by eliminating the boilerplate iterator code.
Added a visitList() method to make writing visitChildren() methods easier by
eliminating the boilerplate iterator code.

liujed/polyglot-eclipse,xcv58/polyglot,xcv58/polyglot,blue-systems-group/project.maybe.polyglot,liujed/polyglot-eclipse,blue-systems-group/project.maybe.polyglot,xcv58/polyglot,liujed/polyglot-eclipse,liujed/polyglot-eclipse,blue-systems-group/project.maybe.polyglot,blue-systems-group/project.maybe.polyglot,xcv58/polyglot