public function create_evidence_item_transcript($transcript, $credential_id, $hidden = false){

        $transcript_items = array();

        foreach ($transcript as $key => $value) {
            array_push($transcript_items, array(
                'category' => $key,
                'percent' => $value
                )
            );
        }

        $evidence_item = array(
            "evidence_item" => array(
                "description" => 'Course Transcript',
                "category" => "transcript",
                "string_object" => json_encode($transcript_items),
                "hidden" => $hidden
            )
        );

        $result = $this->create_evidence_item($evidence_item, $credential_id);

        return $result;
    }