How to use the @microsoft/rush-lib.Package.createFromNpm function in @microsoft/rush-lib

this._parser.trapErrors(() => {
        if (error) {
          throw error;
        } else {
          const commonRootPackage: Package = Package.createFromNpm(npmPackage);

          const commonPackageLookup: PackageLookup = new PackageLookup();
          commonPackageLookup.loadTree(commonRootPackage);

          const rushLinkJson: IRushLinkJson = { localLinks: {} };

          for (const rushProject of this._rushConfiguration.projects) {
            console.log(os.EOL + 'LINKING: ' + rushProject.packageName);
            linkProject(rushProject, commonRootPackage, commonPackageLookup, this._rushConfiguration, rushLinkJson);
          }

          console.log(`Writing "${this._rushConfiguration.rushLinkJsonFilename}"`);
          JsonFile.saveJsonFile(rushLinkJson, this._rushConfiguration.rushLinkJsonFilename);

          stopwatch.stop();
          console.log(os.EOL + colors.green(`Rush link finished successfully. (${stopwatch.toString()})`));