/**
  * @param User    $user
  * @param integer $size
  *
  * @return string
  */
 protected function renderDefaultGravatar(User $user, $size)
 {
     return sprintf('http://www.gravatar.com/avatar/%s&s=%s', md5(strtolower(trim($user->getEmailCanonical()))), $size);
 }
 /**
  * @param User $user
  */
 public function getQueryBuilderReportsForUser(User $user)
 {
     $qb = $this->createQueryBuilder();
     $qb->field('userId')->equals($user->getId())->sort('createdAt', 'desc');
     return $qb;
 }