src/vs/workbench/contrib/mergeEditor/browser/model/mapping.ts/RangeMapping/addOutputLineDelta
class RangeMapping:	addOutputLineDelta(deltaLines: number): RangeMapping {
		return new RangeMapping(
			this.inputRange,
			new Range(
				this.outputRange.startLineNumber + deltaLines,
				this.outputRange.startColumn,
				this.outputRange.endLineNumber + deltaLines,
				this.outputRange.endColumn
			)
		);
	}