src/vs/workbench/contrib/mergeEditor/browser/model/mergeEditorModel.ts/MergeEditorModel/setHandled
class MergeEditorModel:	public setHandled(baseRange: ModifiedBaseRange, handled: boolean, tx: ITransaction): void {
		const state = this.modifiedBaseRangeResultStates.get().get(baseRange)!;
		if (state.handled.get() === handled) {
			return;
		}

		state.handledInput1.set(handled, tx);
		state.handledInput2.set(handled, tx);
	}