src/vs/workbench/common/editor/sideBySideEditorInput.ts/SideBySideEditorInput/constructor
class SideBySideEditorInput:	constructor(
		protected readonly preferredName: string | undefined,
		protected readonly preferredDescription: string | undefined,
		readonly secondary: EditorInput,
		readonly primary: EditorInput,
		@IEditorService private readonly editorService: IEditorService
	) {
		super();

		this.registerListeners();
	}