options['idempotencyKey'] = $idempotencyKey; } /** * A unique string value to identify API call. This should be a unique string value per API call and can be a randomly generated. * * @param string $idempotencyKey A unique string value to identify API call. This should be a unique string value per API call and can be a randomly generated. * @return $this Fluent Builder */ public function setIdempotencyKey(string $idempotencyKey): self { $this->options['idempotencyKey'] = $idempotencyKey; return $this; } /** * Provide a friendly representation * * @return string Machine friendly representation */ public function __toString(): string { $options = \http_build_query(Values::of($this->options), '', ' '); return '[Twilio.Api.V2010.CreateUserDefinedMessageOptions ' . $options . ']'; } }