code: public static CombinedInterceptorAndDecoratorStackMethodHandler peekIfNotEmpty() {
          Stack stack = interceptionContexts.get();
          if (stack == null) {
              return null;
          }
          return stack.peek();
      }
docs: Peeks the current top of the stack or returns null if the stack is empty
  @return the current top of the stack or returns null if the stack is empty