src/vs/workbench/browser/parts/editor/editorGroupView.ts/EditorGroupView/run
class EditorGroupView:	private createContainerToolbar(): void {

		// Toolbar Container
		const toolbarContainer = document.createElement('div');
		toolbarContainer.classList.add('editor-group-container-toolbar');
		this.element.appendChild(toolbarContainer);

		// Toolbar
		const groupId = this.model.id;
		const containerToolbar = this._register(new ActionBar(toolbarContainer, {
			ariaLabel: localize('ariaLabelGroupActions', "Editor group actions"), actionRunner: this._register(new class extends ActionRunner {
				override async run(action: IAction) {
					await action.run(groupId);
				}
			})
		}));

		// Toolbar actions
		const removeGroupAction = this._register(new Action(
			CLOSE_EDITOR_GROUP_COMMAND_ID,
			localize('closeGroupAction', "Close"),
			Codicon.close.classNames,
			true,
			async () => this.accessor.removeGroup(this)));

		const keybinding = this.keybindingService.lookupKeybinding(removeGroupAction.id);
		containerToolbar.push(removeGroupAction, { icon: true, label: false, keybinding: keybinding ? keybinding.getLabel() : undefined });
	}