code: public static FramesConfig imports(Configurer configurer)
      {
          Check.notNull(configurer);
  
          return imports(configurer.getRoot());
      }
docs: Imports the frames config from configurer.
  
  @param configurer The configurer reference (must not be <code>null</code>).
  @return The frames data.
  @throws LionEngineException If unable to read node or invalid integer.