message: Corresponding to the CHANGELOG I have changed the import
diff: import { NgModule } from '@angular/core';
  +import {MaterialModule} from '@angular/material';
  import {ConfirmDialog} from '../../components/delete-dialog/confirm-dialog.component';
  import {DialogService} from '../../services/dialog.service';
  @NgModule({
  imports: [
  + MaterialModule
  ],
  exports: [
  ConfirmDialog
  