/**
* Set Variables
*
* Once variables are set they become available within
* the controller class and its "view" files.
*
* @param array|object|string $vars
* An associative array or object containing values
* to be set, or a value's name if string
* @param string $val Value to set, only used if $vars is a string
* @return object
*/
public function vars($vars, $val = '')
/**
* Clear Cached Variables
*
* Clears the cached variables.
*
* @return CI_Loader
*/
public function clear_vars()
/**
* Get Variable
*
* Check if a variable is set and retrieve it.
*
* @param string $key Variable name
* @return mixed The variable or NULL if not found
*/
public function get_var($key)
/**
* Get Variables
*
* Retrieves all loaded variables.
*
* @return array
*/
public function get_vars()
