package mainimport (	"github.com/sanity-io/litter")func main() {	var mapInt = make(map[int]int)	// add	for i := 1; i < 10; i++ {		mapInt[i] = i	}	litter.Dump(mapInt)	// update	mapInt[3] = 0	litter.Dump(mapInt)	// del	delete(mapInt, 3)	litter.Dump(mapInt)	// del when iterator	for k, v := range mapInt {		if v % 2 == 0 {			delete(mapInt, k)		}	}	litter.Dump(mapInt)	// query	v, ok := mapInt[9]	if ok {		litter.Dump(v, "is exist!")	}}outputmap[int]int{  1: 1,  2: 2,  3: 3,  4: 4,  5: 5,  6: 6,  7: 7,  8: 8,  9: 9,}map[int]int{  1: 1,  2: 2,  3: 0,  4: 4,  5: 5,  6: 6,  7: 7,  8: 8,  9: 9,}map[int]int{  1: 1,  2: 2,  4: 4,  5: 5,  6: 6,  7: 7,  8: 8,  9: 9,}map[int]int{  1: 1,  5: 5,  7: 7,  9: 9,}9 "is exist!"