Interface Change

packages/schematics/angular/utility/change.ts:16–29

}

export interface Change {
  apply(host: Host): Promise<void>;

  // The file this change should be applied to. Some changes might not apply to
  // a file (maybe the config).
  readonly path: string | null;

  // The order this change should be applied. Normally the position inside the file.
  // Changes are applied from the bottom of a file to the top.
  readonly order: number;

  // The description of this change. This will be outputted in a dry or verbose run.
  readonly description: string;
}

/**
 * An operation that does nothing.