code: public ExtendedPropertyDescriptor setReadOnly() {
          try {
              setWriteMethod(null);
          } catch (IntrospectionException e) {
              Logger.getLogger(ExtendedPropertyDescriptor.class.getName()).log(Level.SEVERE, null, e);
          }
          return this;
      }
docs: Force this property to be readonly.
  
  @return this property for chaining calls.