src/vs/workbench/api/browser/mainThreadEditors.ts/MainThreadTextEditors/_updateActiveAndVisibleTextEditors
class MainThreadTextEditors:	private _updateActiveAndVisibleTextEditors(): void {

		// editor columns
		const editorPositionData = this._getTextEditorPositionData();
		if (!objectEquals(this._editorPositionData, editorPositionData)) {
			this._editorPositionData = editorPositionData;
			this._proxy.$acceptEditorPositionData(this._editorPositionData);
		}
	}