Firm::getSubspecialty PHP Method

    public function getSubspecialty()
    {
        return $this->serviceSubspecialtyAssignment ? $this->serviceSubspecialtyAssignment->subspecialty : null;
    }

 /**
  * Check if the Firm is supported in this display context.
  *
  * @param Firm $firm
  *
  * @return bool
  */
 public function checkFirm(Firm $firm)
 {
     if ($this->firm_id) {
         return $firm->id == $this->firm_id;
     }
     if ($this->subspecialty_id) {
         $firm_subspecialty = $firm->getSubspecialty();
         return $firm_subspecialty && $firm_subspecialty->id == $this->subspecialty_id;
     }
     // no restriction on firm or subspecialty
     return true;
 }