src/Concerns/HasHttpAssertions.php
public function assertIsIncluded(string $type, $id): self
    {
        $identifier = $this->identifier(compact('type', 'id'));

        $this->getDocument()->assertIncludedContainsResource(
            $identifier['type'],
            $identifier['id']
        );

        return $this;
    }
public function assertIsIncluded(string $type, $id): self
    {
        $identifier = $this->identifier(compact('type', 'id'));

        $this->getDocument()->assertIncludedContainsResource(
            $identifier['type'],
            $identifier['id']
        );

        return $this;
    }
Assert that the expected resource is included in the document.

@param string $type
@param UrlRoutable|string|int|null $id
@return $this