public function stackTraceHashId()
    {
        if (!isset($this->stackTraceHashId)) {
            // take the lower 16 digits of the md5
            $md5 = md5(serialize($this->stackTrace));
            $this->stackTraceHashId = substr($md5, 16);
        }
        return $this->stackTraceHashId;
    }
public function stackTraceHashId()
    {
        if (!isset($this->stackTraceHashId)) {
            // take the lower 16 digits of the md5
            $md5 = md5(serialize($this->stackTrace));
            $this->stackTraceHashId = substr($md5, 16);
        }
        return $this->stackTraceHashId;
    }
public function stackTraceHashId ( ) { if ( ! isset ( $ this -> stackTraceHashId ) ) { // take the lower 16 digits of the md5 $ md5 = md5 ( serialize ( $ this -> stackTrace ) ) ; $ this -> stackTraceHashId = substr ( $ md5 , 16 ) ; } return $ this -> stackTraceHashId ; }
Return a hash id for this span's stackTrace in hexadecimal

@return string
Return a hash id for this span s stackTrace in hexadecimal