src/vs/workbench/contrib/mergeEditor/browser/view/viewModel.ts/MergeEditorViewModel/setState
class MergeEditorViewModel:	public setState(
		baseRange: ModifiedBaseRange,
		state: ModifiedBaseRangeState,
		tx: ITransaction
	): void {
		this.manuallySetActiveModifiedBaseRange.set(baseRange, tx);
		this.lastFocusedEditor.clearCache(tx);
		this.model.setState(baseRange, state, true, tx);
	}