*/ public function getParameters(): array; public function addParameters(Parameter ...$parameters): static; public function setParameters(Parameter ...$parameters): static; /** * @return list */ public function getAttachments(): array; public function addAttachments(AttachmentResult ...$attachments): static; public function setAttachments(AttachmentResult ...$attachments): static; /** * @return list */ public function getSteps(): array; public function addSteps(StepResult ...$steps): static; public function setSteps(StepResult ...$steps): static; }