public String getPackageVersion(DebianDependency pkg, boolean onlyInstalled) {
   GetPackageVersionResult packageResult = new GetPackageVersionResult();
   IOUtil.executeProcess(new String[] {"dpkg", "--status", pkg.getPackageName()}, packageResult);
   if (packageResult.getResult() != null) {
     return packageResult.getResult();
   }
   if (!onlyInstalled) {
     GetChangelogVersionResult versionResult = new GetChangelogVersionResult(pkg.getPackageName());
     IOUtil.executeProcess(
         new String[] {
           "apt-get", "--no-act", "--verbose-versions", "install", pkg.getPackageName()
         },
         versionResult);
     if (versionResult.getResult() != null) {
       return versionResult.getResult();
     }
   }
   return null;
 }
 /**
  * Searches the package containing the Javadoc for the specified package.
  *
  * @param dependency
  */
 public DebianDependency searchJavaDocPkg(DebianDependency dependency) {
   DebianDependency pkg =
       searchPkg(new File("/usr/share/doc/" + dependency.getPackageName() + "/api/index.html"));
   if (pkg == null) {
     pkg =
         searchPkg(
             new File("/usr/share/doc/" + dependency.getPackageName() + "-doc/api/index.html"));
   }
   if (pkg == null) {
     pkg =
         searchPkg(
             new File("/usr/share/doc/" + dependency.getPackageName() + "/apidocs/index.html"));
   }
   if (pkg == null) {
     pkg =
         searchPkg(
             new File(
                 "/usr/share/doc/" + dependency.getPackageName() + "-doc/apidocs/index.html"));
   }
   return pkg;
 }