Inheritance: extends PayPal\EBLBaseComponents\AbstractRequestType
 public function toXMLString()
 {
     $str = '';
     $str .= '<ns:GetAccessPermissionDetailsReq>';
     if ($this->GetAccessPermissionDetailsRequest != null) {
         $str .= '<ns:GetAccessPermissionDetailsRequest>';
         $str .= $this->GetAccessPermissionDetailsRequest->toXMLString();
         $str .= '</ns:GetAccessPermissionDetailsRequest>';
     }
     $str .= '</ns:GetAccessPermissionDetailsReq>';
     return $str;
 }