code: @Override
      protected void denyImportDeclaration(ImportDeclaration importDeclaration) {
          LOG.debug("CXFImporter destroy a proxy for " + importDeclaration);
          ServiceRegistration serviceRegistration = map.get(importDeclaration);
          serviceRegistration.unregister();
  
          // set the importDeclaration has unhandled
          super.unhandleImportDeclaration(importDeclaration);
  
          map.remove(importDeclaration);
      }
docs: Destroy the proxy & update the map containing the registration ref.
  
  @param importDeclaration