CreateNestedTypeDefCommand(TypeNode ownerType, TypeDefOptions options) {
this.ownerType = ownerType;
var modNode = ownerType.GetModuleNode();
Debug.Assert(modNode != null);
if (modNode == null)
throw new InvalidOperationException();
nestedType = ownerType.Create(options.CreateTypeDef(modNode.Document.ModuleDef));
}
