src/vs/workbench/api/common/extHostTextEditor.ts/ExtHostTextEditor/_trySetSelection
class ExtHostTextEditor:	private async _trySetSelection(): Promise<vscode.TextEditor | null | undefined> {
		const selection = this._selections.map(TypeConverters.Selection.from);
		await this._runOnProxy(() => this._proxy.$trySetSelections(this.id, selection));
		return this.value;
	}