How to display all session variables

[eluser]fserrano[/eluser]
How can I quickly display all my session variables in the session array? I can't see the answer to this question in the User Guide Session Class page.

This wouldn't work:

Code:

echo "<pre>";
echo print_r($this->session());
echo "</pre>";

This wouldn't work either:

Code:

echo "<pre>";
echo print_r($_SESSION);
echo "</pre>";

User Guide