code: public Class getNewClass() throws IllegalStateException, ClassFormatError {
          if (mClass != null) {
              return mClass;
          }
          ByteArrayOutputStream data = mData;
          if (data == null) {
              throw new IllegalStateException("Class not defined yet");
          }
  
          byte[] bytes = data.toByteArray();
  
          if (DEBUG) {
              File file = new File(mName.replace('.', '/') + ".class");
              try {
                  File tempDir = new File(System.getProperty("java.io.tmpdir"));
                  file = new File(tempDir, file.getPath());
              } catch (SecurityException e) {
              }
              try {
                  file.getParentFile().mkdirs();
                  System.out.println("ClassInjector writing to " + file);
                  OutputStream out = new FileOutputStream(file);
                  out.write(bytes);
                  out.close();
              } catch (Exception e) {
                  e.printStackTrace();
              }
          }
  
          mClass = mLoader.define(mName, bytes);
          mData = null;
          return mClass;
      }
docs: Returns the newly defined class.
  
  @throws IllegalStateException if class was never defined