public function set($key, $value)
        {
            $this->values[$this->normalizeKey($key)] = $value;

            return $this;
        }
public function set($key, $value)
        {
            $this->values[$this->normalizeKey($key)] = $value;

            return $this;
        }
public function set ( $ key , $ value ) { $ this -> values [ $ this -> normalizeKey ( $ key ) ] = $ value ; return $ this ; }
Set data key to value
@param string $key   The data key
@param mixed  $value The data value
Set data key to value