B4J Question How to get JSON key name

{
          "CODE": "459",
          "PRODUCT": "RASUDADORA BIC SHAVER 48/36/1",
          "PROVIDER": "AJFA SAS",
          "IMAGE_LINK": "https://es.bicworld.com/sites/es.bicworld.com/files/2017-09/BIC-1.jpg",
          "BRAND": "RASURADOR BIC",
          "UND": "48",
          "COD_PRODUCT": "459005",
          "CATEGORY": "CUIDADO PERSONAL"
}