code: public Object apply(Object pLeft,
                          Object pRight,
                          Object pContext,
                          Logger pLogger)
              throws ELException {
          if (pLeft == pRight) {
              return Boolean.FALSE;
          } else if (pLeft == null ||
                  pRight == null) {
              return Boolean.FALSE;
          } else {
              return super.apply(pLeft, pRight, pContext, pLogger);
          }
      }
docs: Applies the operator to the given value