code: public final RESULT getResult(ELContext context) {
          @SuppressWarnings("unchecked")
          final State state = UEL.getContext(context, State.class);
          Validate.validState(state != null && state.completion != Completion.NO);
          try {
              return state.result;
          } finally {
              state.reset();
          }
      }
docs: Get result. Should be called exactly once after a context operation (optional if the HelperELResolver instance is
  not to be reused).
  
  @return RESULT