Function clean

docs/app/js/sanddance-app.js:106947–106960

()

            } else return test;
        },
        clean () {
            const next = {};
            let size = 0;
            for(const key8 in obj){
                const value = obj[key8];
                if (value !== NULL && (!test || !test(value))) {
                    next[key8] = value;
                    ++size;
                }
            }
            map.size = size;
            map.empty = 0;
            map.object = obj = next;
        }
    };
    if (input) Object.keys(input).forEach((key9)=>{
        map.set(key9, input[key9]);