setTelnyxParam($telnyxParam); return $instance; } /** * Gets the parameter related to the error. * * @return string|null */ public function getTelnyxParam() { return $this->telnyxParam; } /** * Sets the parameter related to the error. * * @param string|null $telnyxParam */ public function setTelnyxParam($telnyxParam) { $this->telnyxParam = $telnyxParam; } }