* @param $element Name of the request element we want to check
* @return $isSet Whether the request element is set
*/
- function isRequestElementSet ($element);
+ function isRequestElementSet (string $element);
/**
* Getter for request element or 'null' if element was not found
* @return $value Value of the found request element or 'null' if the
* element was not found
*/
- function getRequestElement ($element);
+ function getRequestElement (string $element);
/**
* Setter for request elements
* @param $value Value to set
* @return void
*/
- function setRequestElement ($element, $value);
+ function setRequestElement (string $element, $value);
/**
* Setter for request data array