src/vs/workbench/api/browser/mainThreadEditor.ts/MainThreadTextEditorProperties/_readVisibleRangesFromCodeEditor
class MainThreadTextEditorProperties:	private static _readVisibleRangesFromCodeEditor(previousProperties: MainThreadTextEditorProperties | null, codeEditor: ICodeEditor | null): Range[] {
		if (codeEditor) {
			return codeEditor.getVisibleRanges();
		}
		return [];
	}