description; } public function setDescription(string $description): self { $this->description = $description; return $this; } public function getThematic(): ?ThematicInterface { return $this->thematic; } public function setThematic(?ThematicInterface $thematic): self { $this->thematic = $thematic; return $this; } public function getSubthematic(): ?SubthematicInterface { return $this->subthematic; } public function setSubthematic(?SubthematicInterface $subthematic): self { $this->subthematic = $subthematic; return $this; } }