src/SystemProperties/ContentType.php
public function jsonSerialize(): array
    {
        return \array_filter(\array_merge(
            parent::jsonSerialize(),
            $this->jsonSerializeEdited(),
            $this->jsonSerializeEnvironment(),
            $this->jsonSerializeSpace()
        ));
    }
public function jsonSerialize(): array
    {
        return \array_filter(\array_merge(
            parent::jsonSerialize(),
            $this->jsonSerializeEdited(),
            $this->jsonSerializeEnvironment(),
            $this->jsonSerializeSpace()
        ));
    }
{@inheritdoc}