/**
   * Merge the input and output source-maps, replacing the source-map comment in the output file
   * with an appropriate source-map comment pointing to the merged source-map.
   */
  protected renderSourceAndMap(
      file: AnalyzedFile, input: SourceMapInfo, output: MagicString,
      outputPath: string): RenderResult {
    const outputMapPath = `${outputPath}.map`;
    const outputMap = output.generateMap({
      source: file.sourceFile.fileName,
      includeContent: true,
      // hires: true // TODO: This results in accurate but huge sourcemaps. Instead we should fix
      // the merge algorithm.
    });

    // we must set this after generation as magic string does "manipulation" on the path
    outputMap.file = outputPath;

    const mergedMap =
        mergeSourceMaps(input.map && input.map.toObject(), JSON.parse(outputMap.toString()));

    if (input.isInline) {
      return {
        file,
        source: {path: outputPath, contents: `${output.toString()}\n${mergedMap.toComment()}`},
        map: null
      };
    } else {
      return {
        file,
        source: {
          path: outputPath,
          contents: `${output.toString()}\n${generateMapFileComment(outputMapPath)}`
        },
        map: {path: outputMapPath, contents: mergedMap.toJSON()}
      };
    }
  }

  /**
   * Merge the input and output source-maps, replacing the source-map comment in the output file
   * with an appropriate source-map comment pointing to the merged source-map.
   */
  protected renderSourceAndMap(
      sourceFile: ts.SourceFile, input: SourceMapInfo, output: MagicString): FileInfo[] {
    const outputPath = resolve(this.targetPath, relative(this.sourcePath, sourceFile.fileName));
    const outputMapPath = `${outputPath}.map`;
    const outputMap = output.generateMap({
      source: sourceFile.fileName,
      includeContent: true,
      // hires: true // TODO: This results in accurate but huge sourcemaps. Instead we should fix
      // the merge algorithm.
    });

    // we must set this after generation as magic string does "manipulation" on the path
    outputMap.file = outputPath;

    const mergedMap =
        mergeSourceMaps(input.map && input.map.toObject(), JSON.parse(outputMap.toString()));

    const result: FileInfo[] = [];
    if (input.isInline) {
      result.push({path: outputPath, contents: `${output.toString()}\n${mergedMap.toComment()}`});
    } else {
      result.push({
        path: outputPath,
        contents: `${output.toString()}\n${generateMapFileComment(outputMapPath)}`
      });
      result.push({path: outputMapPath, contents: mergedMap.toJSON()});
    }
    return result;
  }

  transform: (code: string) => {
    const newContent = new MagicString(code);

    // Walks through every occurrence of a license comment and overwrites it with an empty string.
    for (let pos = -1; (pos = code.indexOf(licenseBanner, pos + 1)) !== -1; null) {
      newContent.overwrite(pos, pos + licenseBanner.length, '');
    }

    return {
      code: newContent.toString(),
      map:  newContent.generateMap({ hires: true })
    };
  }