key; } public function setKey(string $key): static { $this->key = $key; return $this; } public function getValue(): ?string { return $this->value; } public function setValue(string $value): static { $this->value = $value; return $this; } public function getSection(): ConfigSectionType { return $this->section; } public function setSection(ConfigSectionType $section): static { $this->section = $section; return $this; } function __toString(): string { return $this->getKey(); } }