src/vs/workbench/browser/parts/editor/sideBySideEditor.ts/SideBySideAwareEditorPaneSelection/restore
class SideBySideAwareEditorPaneSelection:	restore(options: IEditorOptions): ISideBySideEditorOptions {
		const sideBySideEditorOptions: ISideBySideEditorOptions = {
			...options,
			target: this.side
		};

		return this.selection.restore(sideBySideEditorOptions);
	}