You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: in_array.go
    path of file: ./repos/expr/optimizer
    
    the code of the file until where you have to start completion: package optimizer

import (
	"reflect"

	. "github.com/expr-lang/expr/ast"
)

type inArray struct{}

func (*inArray) Visit(node *Node) {
	switch n := (*node).(type) {
	case *BinaryNode:
		if n.Operator == "in" {
			if array, ok := n.Right.(*ArrayNode); ok {
				if len(array.Nodes) > 0 {
					t := n.Left.Type()
					if t == nil || t.Kind() != reflect.Int {
						// This optimization can be only performed if left side is int type,
						// as runtime.in func uses reflect.Map.MapIndex and keys of map must,
						// be same as checked value type.
						goto string
					}

					for _, 
    
func (*inArray) Visit(node *Node) {
	switch n := (*node).(type) {
	case *BinaryNode:
		if n.Operator == "in" {
			if array, ok := n.Right.(*ArrayNode); ok {
				if len(array.Nodes) > 0 {
					t := n.Left.Type()
					if t == nil || t.Kind() != reflect.Int {
						// This optimization can be only performed if left side is int type,
						// as runtime.in func uses reflect.Map.MapIndex and keys of map must,
						// be same as checked value type.
						goto string
					}

					for _, a := range array.Nodes {
						if _, ok := a.(*IntegerNode); !ok {
							goto string
						}
					}
					{
						value := make(map[int]struct{})
						for _, a := range array.Nodes {
							value[a.(*IntegerNode).Value] = struct{}{}
						}
						Patch(node, &BinaryNode{
							Operator: n.Operator,
							Left:     n.Left,
							Right:    &ConstantNode{Value: value},
						})
					}

				string:
					for _, a := range array.Nodes {
						if _, ok := a.(*StringNode); !ok {
							return
						}
					}
					{
						value := make(map[string]struct{})
						for _, a := range array.Nodes {
							value[a.(*StringNode).Value] = struct{}{}
						}
						Patch(node, &BinaryNode{
							Operator: n.Operator,
							Left:     n.Left,
							Right:    &ConstantNode{Value: value},
						})
					}

				}
			}
		}
	}
}