<PackageReference Include="NUnit" Version="4.2.2" />

NUnit.Framework.Internal.Builders.NamespaceTreeBuilder

public class NamespaceTreeBuilder
Class that can build a tree of automatic namespace suites from a group of fixtures.
namespace NUnit.Framework.Internal.Builders { public class NamespaceTreeBuilder { public TestSuite RootSuite { get; } public NamespaceTreeBuilder(TestSuite rootSuite); public void Add(IList<Test> fixtures); public void Add(TestSuite fixture); } }