com.liferay.portal.kernel.portlet
Interfaces 
ConfigurationAction
FriendlyURLMapper
LiferayPortletSession
LiferayPortletURL
LiferayRenderRequest
PortletLayoutListener
Classes 
ActionRequestWrapper
ActionResponseWrapper
BaseFriendlyURLMapper
DynamicRenderRequest
LiferayPortlet
LiferayPortletMode
LiferayWindowState
NoRedirectActionResponse
PortletRequestWrapper
PortletResponseWrapper
PortletURLWrapper
ProtectedActionRequest
ProtectedRenderRequest
RenderRequestWrapper
RenderResponseWrapper
Exceptions 
PortletLayoutListenerException