Message::validateParts(): void

98    private function validateParts(): void99    {100        foreach ($this->parts as $part) {101            $type = $part->getType();102            if ($this->role->isUser() && $type->isFunctionCall()) {103                throw new InvalidArgumentException('User messages cannot contain function calls.');104            }105            if ($this->role->isModel() && $type->isFunctionResponse()) {106                throw new InvalidArgumentException('Model messages cannot contain function responses.');107            }108        }109    }