src/Upwork/API/Routers/Hr/Milestones.php
public function getSubmissions($milestoneId)
    {
        ApiDebug::p(__FUNCTION__);

        $response = $this->_client->get('/hr/v3/fp/milestones/' . $milestoneId . '/submissions');
        ApiDebug::p('found response info', $response);

        return $response;
    }
public function getSubmissions($milestoneId)
    {
        ApiDebug::p(__FUNCTION__);

        $response = $this->_client->get('/hr/v3/fp/milestones/' . $milestoneId . '/submissions');
        ApiDebug::p('found response info', $response);

        return $response;
    }
Get all Submissions for specific Milestone

@param   integer $milestoneId Milestone ID
@return  object