src/vs/workbench/api/browser/mainThreadCustomEditors.ts/MainThreadCustomEditorModel/save
class MainThreadCustomEditorModel:	public async save(options?: ISaveOptions): Promise<boolean> {
		const result = !!await this.saveCustomEditor(options);

		// Emit Save Event
		if (result) {
			this._onDidSave.fire({ reason: options?.reason, source: options?.source });
		}

		return result;
	}