File versionJsonFile = new File(versionTarget, VersionInfo.getVersionTarget() + ".json");

                  try {
                     ByteArrayOutputStream bos = new ByteArrayOutputStream();
                     Writer writer = new OutputStreamWriter(bos, Charsets.UTF_8);
                     PrettyJsonFormatter.fieldOrderPreservingPrettyJsonFormatter().format(versionJson, writer);
                     writer.close();
                     byte[] output = bos.toByteArray();
                     List<AppendInfo> lst = Lists.newArrayList();
                     Iterator var23 = VersionInfo.getOptionals().iterator();

                     while(var23.hasNext()) {
                        OptionalLibrary opt = (OptionalLibrary)var23.next();
                        if (optionals.apply(opt.getArtifact()) && opt.isInjected()) {
                           lst.add(new ClientInstall.AppendInfo(opt.getArtifact(), opt.getMaven()));
                        }
                     }

                     var23 = transforms.iterator();

                     while(var23.hasNext()) {
                        TransformInfo info = (TransformInfo)var23.next();
                        if (info.append) {
                           lst.add(new ClientInstall.AppendInfo(info.output.getDescriptor(), info.maven));
                        }
                     }

                     if (lst.size() > 0) {
                        BufferedReader reader = new BufferedReader(new StringReader(new String(output, Charsets.UTF_8)));
                        bos = new ByteArrayOutputStream();
                        PrintWriter printer = new PrintWriter(new OutputStreamWriter(bos, Charsets.UTF_8));
                        String line = null;
                        String prefix = null;
                        boolean added = false;

                        while(true) {
                           while((line = reader.readLine()) != null) {
                              if (added) {
                                 printer.println(line);
                              } else {
                                 if (line.contains("\"libraries\": [")) {
                                    prefix = line.substring(0, line.indexOf(34));
                                 } else if (prefix != null && line.startsWith(prefix + "]")) {
                                    printer.println(prefix + "\t,");

                                    for(int x = 0; x < lst.size(); ++x) {
                                       ClientInstall.AppendInfo info = (ClientInstall.AppendInfo)lst.get(x);
                                       printer.println(prefix + "\t{");
                                       printer.println(prefix + "\t\t\"name\": \"" + info.artifact + "\"" + info.maven == null ? "" : ",");
                                       if (info.maven != null) {
                                          printer.println(prefix + "\t\t\"url\": \"" + info.maven + "\"");
                                       }

                                       if (x < lst.size() - 1) {
                                          printer.println(prefix + "\t},");
                                       } else {
                                          printer.println(prefix + "\t}");
                                       }
                                    }

                                    added = true;
                                 }

                                 printer.println(line);
                              }
                           }

                           printer.close();
                           output = bos.toByteArray();
                           break;
                        }
                     }

                     Files.write(output, versionJsonFile);
                  } catch (Exception var33) {
                     JOptionPane.showMessageDialog(null, "There was a problem writing the launcher version data,  is it write protected?", "Error", 0);
                     return false;
                  }