<PackageReference Include="NUnit" Version="4.3.0" />

NUnit.Framework.Internal.TestMethod

public class TestMethod : Test
The TestMethod class represents a Test implemented as a method.
namespace NUnit.Framework.Internal { public class TestMethod : Test { public new IMethodInfo Method { get; set; } public TestMethod(IMethodInfo method); public TestMethod(IMethodInfo method, Test parentSuite); } }