src/View/Requirements_Backend.php
public function customCSS($script, $uniquenessID = null)
    {
        if ($uniquenessID) {
            $this->customCSS[$uniquenessID] = $script;
        } else {
            $this->customCSS[] = $script;
        }
    }
public function customCSS($script, $uniquenessID = null)
    {
        if ($uniquenessID) {
            $this->customCSS[$uniquenessID] = $script;
        } else {
            $this->customCSS[] = $script;
        }
    }
public function customCSS ( $ script , $ uniquenessID = null ) { if ( $ uniquenessID ) { $ this -> customCSS [ $ uniquenessID ] = $ script ; } else { $ this -> customCSS [ ] = $ script ; } }
Register the given CSS styles into the list of requirements

@param string $script CSS selectors as a string (without enclosing <style> tag)
@param string $uniquenessID A unique ID that ensures a piece of code is only added once
Register the given CSS styles into the list of requirements