docs: public Object apply(String source, int lineNo, int columnNo, Object funcBody, Vector paramNames,
                          Vector arguments) throws BSFException {
          Object object = eval(source, lineNo, columnNo, funcBody);
          if (object instanceof Closure) {
              // lets call the function
              Closure closure = (Closure) object;
              return closure.call(arguments.toArray());
          }
          return object;
      }