Added a hook for specifying the type to be extended when de-anonymizing classes that implement interfaces.
Added a hook for specifying the type to be extended when de-anonymizing classes that implement interfaces.

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