export class TaskType {

  private static readonly _call: string = 'call';
  private static readonly _meeting: string = 'meeting';
  private static readonly _checkup: string = 'checkup';
  private static readonly _payment: string = 'payment';

  private static readonly _types: string[] = [
    TaskType._call,
    TaskType._meeting,
    TaskType._checkup,
    TaskType._payment,
  ];

  public get call(): string {
    return TaskType._call;
  }

  public get meeting(): string {
      return TaskType._meeting;
  }

  public get payment(): string {
      return TaskType._payment;
  }

  public get checkup(): string {
      return TaskType._checkup;
  }

  public get all(): string[] {
      return TaskType._types;
  }
}