The MutableResourceParameters interface provides methods for modifying
the resource parameters attached to a portlet resource URL.
If the MutableResourceParameters object was retrieved from
a URL, changes made will be applied to the URL.
The modified parameters will be available during requests
triggered by the URL.
RenderState provides a description of the render state.
PortletParameters provides a description of the parameter concept.
RenderState, PortletParameters, ResourceParameters, ResourceRequest, ResourceURL