A way to check if struct implements an interface

implements.go

package main

import (
	"sort"
)

type RawMessage []int

func (mes RawMessage) Len() int {
	return len(mes)
}

var _ sort.Interface = (*RawMessage)(nil)

/*
^^^^^^^
cannot use (*RawMessage)(nil) (type *RawMessage) as type sort.Interface in assignment:
*RawMessage does not implement sort.Interface (missing Less method)
*/

func main() {
}