org.codehaus.groovy.grails.web.servlet.mvc
Interfaces 
GrailsControllerHelper
ParameterCreationListener
ParameterInitializationCallback
Classes 
GrailsHttpSession
GrailsParameterMap
GrailsUrlHandlerMapping
GrailsWebRequest
GrailsWebRequestFilter
SimpleGrailsController
SimpleGrailsControllerHelper