How to use the @swim/codec.Mark.at function in @swim/codec

private static tsMark(position: number, file: ts.SourceFile, note: string | null = null): Mark {
    const {line, character} = file.getLineAndCharacterOfPosition(position);
    return Mark.at(position, line + 1, character + 1, note);
  }

private static tslinkMark(pos: tslint.RuleFailurePosition, shift: number = 0, note: string | null = null): Mark {
    const position = pos.getPosition();
    const {line, character} = pos.getLineAndCharacter();
    return Mark.at(position + shift, line + 1, character + shift + 1, note);
  }

private static tsMark(position: number, file: ts.SourceFile, note: string | null = null): Mark {
    const {line, character} = file.getLineAndCharacterOfPosition(position);
    return Mark.at(position, line + 1, character + 1, note);
  }

private static tslinkMark(pos: tslint.RuleFailurePosition, shift: number = 0, note: string | null = null): Mark {
    const position = pos.getPosition();
    const {line, character} = pos.getLineAndCharacter();
    return Mark.at(position + shift, line + 1, character + shift + 1, note);
  }