src/vs/workbench/contrib/mergeEditor/browser/model/mapping.ts/DetailedLineRangeMapping/addOutputLineDelta
class DetailedLineRangeMapping:	public override addOutputLineDelta(delta: number): DetailedLineRangeMapping {
		return new DetailedLineRangeMapping(
			this.inputRange,
			this.inputTextModel,
			this.outputRange.delta(delta),
			this.outputTextModel,
			this.rangeMappings.map(d => d.addOutputLineDelta(delta))
		);
	}