public function containsData()
    {
        if (!isset($this->Data["Series"])) {
            return false;
        }

        foreach (array_keys($this->Data["Series"]) as $Key) {
            if ($this->Data["Abscissa"] != $Key
                && $this->Data["Series"][$Key]["isDrawable"] == true
            ) {
                return true;
            }
        }

        return null;
    }
public function containsData()
    {
        if (!isset($this->Data["Series"])) {
            return false;
        }

        foreach (array_keys($this->Data["Series"]) as $Key) {
            if ($this->Data["Abscissa"] != $Key
                && $this->Data["Series"][$Key]["isDrawable"] == true
            ) {
                return true;
            }
        }

        return null;
    }
public function containsData ( ) { if ( ! isset ( $ this -> Data [ "Series" ] ) ) { return false ; } foreach ( array_keys ( $ this -> Data [ "Series" ] ) as $ Key ) { if ( $ this -> Data [ "Abscissa" ] != $ Key && $ this -> Data [ "Series" ] [ $ Key ] [ "isDrawable" ] == true ) { return true ; } } return null ; }
Test if we have valid data
@return boolean|null
Test if we have valid data