src/vs/workbench/contrib/mergeEditor/browser/model/mergeEditorModel.ts/MergeEditorModel/isInputHandled
class MergeEditorModel:	public isInputHandled(baseRange: ModifiedBaseRange, inputNumber: InputNumber): IObservable<boolean> {
		const state = this.modifiedBaseRangeResultStates.get().get(baseRange)!;
		return inputNumber === 1 ? state.handledInput1 : state.handledInput2;
	}