docs: private static void addFileFunction(CtClass clazz, String property)
          throws NotFoundException, CannotCompileException {
          String wrapperName = property + "wrapper";
          String funcName = "set";
          funcName = funcName + Character.toUpperCase(wrapperName.charAt(0));
          funcName = funcName + wrapperName.substring(1);
          String setterName = "set";
          setterName = setterName + Character.toUpperCase(property.charAt(0));
          setterName = setterName + property.substring(1);
          CtClass[] params = generateClassField(FileWrapper.class);
          CtMethod newFunc = new CtMethod(CtClass.voidType, funcName, params, clazz);
          newFunc.setBody("{ " + setterName + "($1.returnFile());\n }");
          clazz.addMethod(newFunc);
      }