func TestCustomNamedRequestID(t *testing.T) {
	client := newHeaderClient()
	result, err := client.CustomNamedRequestID(context.Background(), "9C4D50EE-2D56-4CD3-8152-34347DC9F2B0", nil)
	if err != nil {
		t.Fatal(err)
	}
	if r := cmp.Diff(result.FooRequestID, to.StringPtr("123")); r != "" {
		t.Fatal(r)
	}
}
CustomNamedRequestID - Send foo-client-request-id = 9C4D50EE-2D56-4CD3-8152-34347DC9F2B0 in the header of the request
package azurespecialsgroup
import (
	"context"
	"testing"
	"github.com/Azure/azure-sdk-for-go/sdk/azcore/to"
	"github.com/google/go-cmp/cmp"
)
func newHeaderClient() *HeaderClient {
	return NewHeaderClient(NewDefaultConnection(nil))
}