How to do instantiate generic delegate instance by ReadAssembly?

[kekyo]

Hi, I wanna do instantiate delegate instance from generic delegate type by read with ReadAssembly:

var assemblyResolver = new DefaultAssemblyResolver();
assemblyResolver.AddSearchDirectory(basePath);

var testAssembly = AssemblyDefinition.ReadAssembly(
    Path.Combine(basePath, "TestTarget.dll"),
    new ReaderParameters { AssemblyResolver = assemblyResolver });

var module = testAssembly.MainModule;

// Contains:
// public delegate void TestGenericDelegate<TValue>(TValue value);

var testGenericDelegateTypeT = module.Types.
    First(t => t.Name == "TestGenericDelegate`1")!;

var testGenericDelegateType = new GenericInstanceType(
    module.ImportReference(testGenericDelegateTypeT));
testGenericDelegateType.GenericArguments.Add(module.TypeSystem.String);

// HOW TO?:
//   Want to: TestGenericDelegate<string>
//   Will get unresolved generic argument constructor ref...
var testGenericDelegateTypeCtor = testGenericDelegateType.Resolve().
    Methods.First(m => m.IsConstructor);

// Will use: Instruction.Create(OpCodes.Newobj, testGenericDelegateTypeCtor)

The testGenericDelegateTypeCtor doesn't come from generic type instance,
it's generic method definition (IsDefinition == true).
How to do it?

Verifying full sample code is here: https://github.com/kekyo/CecilTest/blob/main/CecilTest/Program.cs