package main

type Map[K comparable, V any] struct {
	m map[K]V
}

func NewMap[K comparable, V any]() Map[K, V] {
	return Map[K, V]{m: map[K]V{}}
}

func (m Map[K, V]) Get(key K) V {
	return m.m[key]
}

func main() {
	_ = NewMap[int, struct{}]()
}

$ go build
# sandbox/sand2
<autogenerated>:1: cannot use .this (type *Map[int,struct{}]) as type Map[.shape.int,.shape.struct {}] in argument to Map[.shape.int,.shape.struct {}].Get