# Package org.jboss.resteasy.core.providerfactory

- Class Summary
  Class | Description
  --- | ---
  ClientHelper |
  CommonProviders |
  ExtSortedKey<T> |
  NOOPClientHelper | A ClientHelper that does nothing, useful to save memory when creating a ResteasyProviderFactory for server side only
  NOOPServerHelper | A ServerHelper that does nothing, useful to save memory when creating a ResteasyProviderFactory for client side only
  ResteasyProviderFactoryDelegate | A ResteasyProviderFactoryDelegate.
  ResteasyProviderFactoryImpl |
  ServerHelper |
  SortedKey<T> | Allow us to sort message body implementations that are more specific for their types i.e.
  Utils |