Method transform

packages/common/src/pipes/case_conversion_pipes.ts:40–44

(value: string | null | undefined)

  transform(value: null | undefined): null;
  transform(value: string | null | undefined): string | null;
  transform(value: string | null | undefined): string | null {
    if (value == null) return null;
    assertPipeArgument(LowerCasePipe, value);
    return value.toLowerCase();
  }
}

//