src/vs/workbench/contrib/codeEditor/browser/diffEditorHelper.ts/DiffEditorHelperContribution/_deduceState
class DiffEditorHelperContribution:	private _deduceState(diffComputationResult: IDiffComputationResult | null): WidgetState {
		if (!diffComputationResult) {
			return WidgetState.Hidden;
		}
		if (this._diffEditor.ignoreTrimWhitespace && diffComputationResult.changes.length === 0 && !diffComputationResult.identical) {
			return WidgetState.HintWhitespace;
		}
		return WidgetState.Hidden;
	}