问如何用javascript从map对象中获取密钥

EN

/* Wrapper to format cellphone configuration list for selectors. */
    function buildConfiguration(){
        return {
            "Item 1": {
                name: {
                    "aaa": 1,
                },
                blue: {
                },
                green: {
                },
                black: {
                },
                yellow: {
                }
            },

            "item 2": {
                name: {
                    "aaa 5": 1,
                    "bbb 6": 2,
                    "ccc 7": 3
                },
                blue: {
               },
                green: {
               },
               black: {
               },
               yellow: {
               }
           }
       }
   }