src/vs/workbench/contrib/mergeEditor/browser/model/mapping.ts/DocumentRangeMap/projectRange
class DocumentRangeMap:	public projectRange(range: Range): RangeMapping {
		const start = this.project(range.getStartPosition());
		const end = this.project(range.getEndPosition());
		return new RangeMapping(
			start.inputRange.plusRange(end.inputRange),
			start.outputRange.plusRange(end.outputRange)
		);
	}