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