public void NullableContext() => RoslynTestHelper.CheckApi();
 public void ReferenceNullable() => RoslynTestHelper.CheckApi();
 public void Tuples() => RoslynTestHelper.CheckApi();
 public void Parameters() => RoslynTestHelper.CheckApi();
 public void NamespaceMemberAccessibility() => RoslynTestHelper.CheckApi();
 public void AccessibilityOrdering() => RoslynTestHelper.CheckApi();
 public void NamespaceOrdering() => RoslynTestHelper.CheckApi();
 public void NestedTypes() => RoslynTestHelper.CheckApi();
 public void Unsafe() => RoslynTestHelper.CheckApi();
 public void ArrayTypes() => RoslynTestHelper.CheckApi();
 public void GenericType() => RoslynTestHelper.CheckApi();