code: public CtClass getCtClass() {
          if (ctClass == null && fileName.endsWith(".class")) {
              try {
                  ctClass = ClassPool.getDefault().makeClass(getFileStream());
              } catch (IOException e) {
                  logger.error("make class error", e);
              }
          }
          return ctClass;
      }
docs: <p>Getter for the field <code>ctClass</code>.</p>
  
  @return a {@link javassist.CtClass} object.