getComponentDefinition(name: string, { owner, moduleName }: any): ComponentDefinition<Opaque> {
   let finalizer = _instrumentStart('render.getComponentDefinition', instrumentationPayload, name);
   let source = moduleName && `template:${moduleName}`;
   let definition = this._definitionCache.get({ name, source, owner });
   finalizer();
   // TODO the glimmer-vm wants this to always have a def
   // but internally we need it to sometimes be undefined
   return definition!;
 }

 // a Compiler can wrap the template so it needs its own cache
 getCompiledBlock(Compiler: any, template: OwnedTemplate) {
   let compilerCache = this._compilerCache.get(Compiler);
   return compilerCache.get(template);
 }

 // normally templates should be exported at the proper module name
 // and cached in the container, but this cache supports templates
 // that have been set directly on the component's layout property
 getTemplate(Template: WrappedTemplateFactory, owner: Container): OwnedTemplate {
   return this._templateCache.get({ Template, owner });
 }