src/vs/workbench/api/common/extHostTextEditors.ts/ExtHostEditors/constructor
class ExtHostEditors:	constructor(
		mainContext: IMainContext,
		private readonly _extHostDocumentsAndEditors: ExtHostDocumentsAndEditors,
	) {
		this._proxy = mainContext.getProxy(MainContext.MainThreadTextEditors);


		this._extHostDocumentsAndEditors.onDidChangeVisibleTextEditors(e => this._onDidChangeVisibleTextEditors.fire(e));
		this._extHostDocumentsAndEditors.onDidChangeActiveTextEditor(e => this._onDidChangeActiveTextEditor.fire(e));
	}