The Sapien Response class can be extended to provide other userland functionality.
The properties on Response are private, which means you may not access
them, except through the existing Response methods. You may add child
properties as desired, though they would best be protected or private.
Response is constructorless. You may add any constructor you like, and do not have to call a parent constructor.
Most of the methods on Response are public and final, which means you cannot extend or override them in child classes. This keeps their behavior consistent.
However, these Response methods are not final, and thus are open to extension:
public function setContent(mixed $content) : void
public function send() : void
public function sendContent() : void
You may override them at will (though of course you cannot change the signatures). In general:
Override setContent() to set up the Response properties in relation to
the content. Be sure to call parent::setContent() to actually retain the
content value.
Override send() to perform pre- and post-sending behaviors. Be sure to call
parent::send() to actually send the Response.
Override sendContent() for custom or specialized emitting of the content
value.