message: style(processProp): remove "istanbul-ignore" on tested lines
diff: @@ -194,7 +194,6 @@ export function processProp(input: DecoratedPropertyMetadata): void {
  return;
  default:
  - /* istanbul ignore next */ // ignore because this case should really never happen (typescript prevents this)
  throw new InvalidWhatIsItError(propKind, name, key, 'whatis(Passthrough)');
  }
  }
  