src/vs/workbench/browser/parts/editor/editorActions.ts/CloseLeftEditorsInGroupAction/run
class CloseLeftEditorsInGroupAction:	override async run(context?: IEditorIdentifier): Promise<void> {
		const { group, editor } = this.getTarget(context);
		if (group && editor) {
			await group.closeEditors({ direction: CloseDirection.LEFT, except: editor, excludeSticky: true });
		}
	}