exchange; } public function setExchange(string $exchange): self { $this->exchange = $exchange; return $this; } public function getType(): string { return $this->type; } public function setType(string $type): self { $this->type = $type; return $this; } public function isInternal(): bool { return $this->internal; } public function setInternal(bool $internal): self { $this->internal = $internal; return $this; } }