public function set_seek_position($position)
    {
        $this->seek_position = isset($position) ? (integer)$position : null;

        return $this;
    }
public function set_seek_position($position)
    {
        $this->seek_position = isset($position) ? (integer)$position : null;

        return $this;
    }
public function set_seek_position ( $ position ) { $ this -> seek_position = isset ( $ position ) ? ( integer ) $ position : null ; return $ this ; }
Set the intended starting seek position.

@param integer $position (Required) The byte-position of the stream to begin reading from.
@return $this A reference to the current instance.
Set the intended starting seek position .