src/Liuggio/RackspaceCloudFilesStreamWrapper/StreamWrapper/RackspaceCloudFilesStreamWrapper.php
public function appendPosition($length)
    {
        $this->dataPosition = (int) $this->dataPosition;
        $this->dataPosition += (int) $length;
        return $this;
    }
public function appendPosition($length)
    {
        $this->dataPosition = (int) $this->dataPosition;
        $this->dataPosition += (int) $length;
        return $this;
    }
public function appendPosition ( $ length ) { $ this -> dataPosition = ( int ) $ this -> dataPosition ; $ this -> dataPosition += ( int ) $ length ; return $ this ; }
sum the int of the position to the var given

@param int $length
@return RackspaceCloudFilesStreamWrapper
sum the int of the position to the var given