brewman/overlord/src/app/receipt/receipt-datasource.ts

import { DataSource } from '@angular/cdk/collections';
import { Observable } from 'rxjs';
import { Journal } from '../core/voucher';

export class ReceiptDataSource extends DataSource<Journal> {
  constructor(private data: Observable<Journal[]>) {
    super();
  }

  connect(): Observable<Journal[]> {
    return this.data;
  }

  disconnect() {}
}