getNgModuleMetadata(moduleType: any, throwIfNotFound = true): cpl.CompileNgModuleMetadata|null {
  moduleType = resolveForwardRef(moduleType);
  let compileMeta = this._ngModuleCache.get(moduleType);
  if (compileMeta) {
    return compileMeta;
  }

  const meta = this._ngModuleResolver.resolve(moduleType, throwIfNotFound);
  if (!meta) {
    return null;
  }

  ...
}