message: RecordSource: Improve query/transformBuilder props
diff: @@ -54,8 +54,6 @@ export abstract class RecordSource<
  > {
  protected _keyMap?: RecordKeyMap;
  protected _schema: RecordSchema;
  - protected _queryBuilder!: RecordQueryBuilder;
  - protected _transformBuilder!: RecordTransformBuilder;
  constructor(settings: RecordSourceSettings<QueryOptions, TransformOptions>) {
  const autoActivate =
  @@ -101,11 +99,11 @@ export abstract class RecordSource<
  }
  get queryBuilder(): RecordQueryBuilder {
  - return this._queryBuilder;
  + return this._queryBuilder as RecordQueryBuilder;
  }
  get transformBuilder(): RecordTransformBuilder {
  - return this._transformBuilder;
  + return this._transformBuilder as RecordTransformBuilder;
  }
  /**
  