code: static PluginTypeConfiguration getConfiguration(String pluginType) {
          PluginTypeConfiguration conf = registry.get(pluginType);
          if (conf == null)
              throw new IllegalArgumentException("PluginType '"+pluginType+"' not registered!");
          return conf;
      }
docs: Get {@link PluginTypeConfiguration} for the given plugin type.
  @param pluginType type of the plugin.
  @return PluginTypeConfiguration containing all needed factories.
  @throws IllegalArgumentException if plugin of type 'pluginType' was not registered.