fn call_key_is_generic[T](v T) {
	a := map[T]u8{}
	_ := a.keys().filter(it == v)
}

fn call_value_is_generic[T](v T) {
	a := map[u8]T{}
	_ := a.values().filter(it == v)
}

fn call_all_is_generic_keys_method[T, U](v T) {
	a := map[T]U{}
	_ := a.keys().filter(it == v)
}

fn call_all_is_generic_values_method[T, U](v U) {
	a := map[T]U{}
	_ := a.values().filter(it == v)
}

fn test_call_has_generic() {
	call_key_is_generic[int](1)
	call_value_is_generic[string]('')
	call_all_is_generic_keys_method[int, string](1)
	call_all_is_generic_values_method[int, string]('')
	assert true
}