message: Update isPrivate feature parameter type.
diff: @@ -1067,8 +1067,8 @@ interface MaybePrivate {
  /**
  * Return whether the given Analyzer feature has "private" visibility.
  */
  -function isPrivate(feature: analyzer.Feature): boolean {
  - return ((feature as MaybePrivate).privacy === 'private');
  +function isPrivate(feature: analyzer.Feature&MaybePrivate): boolean {
  + return feature.privacy === 'private';
  }
  /**
  