See what items have a chest

Hello, I explain, I need a way to see what items are in a chest, ie for example if I put a chest and place an apple and a stone sword if I then place the command "/ chest" tell me "there is a apple and a stone sword "

 

Check nearby tiles if chest when you use /chest command. And show player to item names with

PHP:

Chest->getInventory()->getContents()

this is for get items.

 

There is the proof