1..8
# ->initialize()
 -  takes an array of options as its second argument
 -  returns options for response instance
# ->getContent() ->setContent()
 -  returns the current response content which is null by default
 -  sets the response content
# ->sendContent()
 -  output the current response content
# ->serialize() ->unserialize()
 - sfResponse implements the Serializable interface
# New methods via sfEventDispatcher
 -  accepts new methods via sfEventDispatcher
 -  throws an exception if the method does not exist as a sfEventDispatcher listener
# Looks like everything went fine.