public function getJsonContents()
	{
		$default = [];

		$path = $this->getJsonPath();

		if ($this->files->exists($path)) {
			$contents = $this->files->get($path);

			return json_decode($contents, true);
		} else {
			throw new UnknownFileException("The theme must have a valid theme.json manifest file.");
		}
	}