code: public void removeGlobals ()
      {
          Iterator<String> i = _imports.iterator();
          while (i.hasNext()) {
              String name = i.next();
              if (name.indexOf('.') == -1) {
                  i.remove();
              } else if (name.startsWith("java.lang")) {
                  i.remove();
              }
          }
      }
docs: Gets rid of primitive and java.lang imports.