How do you use this? is there a main.go code I can reference?

[unisqu]

I'm trying to try to code but have no idea how to use. Can you please provide the instructions? I've configure make install judy c code. but these codes doesnt run. it says

./main.go:5: imported and not used: "github.com/gnoso/go-judy" as judy
./main.go:16: j.Free undefined (type JudyL has no field or method Free)
./main.go:17: j.Insert undefined (type JudyL has no field or method Insert)
./main.go:18: j.Get undefined (type JudyL has no field or method Get)
./main.go:19: j.Get undefined (type JudyL has no field or method Get)
./main.go:20: j.Delete undefined (type JudyL has no field or method Delete)
./main.go:21: j.Delete undefined (type JudyL has no field or method Delete)

pls help.

package main

import (
                "fmt"
                "github.com/gnoso/go-judy"
       )

type JudyL struct {
    // contains filtered or unexported fields
    uid uint32

}
//var judy JudyL;
func main() {
j := JudyL{} // declare empty JudyL integer map array
   defer j.Free() // make sure the array is freed when finished
           j.Insert(11235, 1123)   // returns true
           val, ok := j.Get(11235) // val == 1123, ok == true
           _, ok = j.Get(1) // ok == false (not found)
           j.Delete(11235) // returns true
           j.Delete(11235) // returns false (doesn't exist)
           fmt.Printf("Hello world! My lucky number is %d", val)

}