public function edit($commentId, $body)
	{
		// Build the request path.
		$path = '/gists/comments/' . (int) $commentId;

		// Build the request data.
		$data = json_encode(
			array(
				'body' => $body
			)
		);

		// Send the request.
		$response = $this->client->patch($this->fetchUrl($path), $data);

		// Validate the response code.
		if ($response->code != 200)
		{
			// Decode the error response and throw an exception.
			$error = json_decode($response->body);
			throw new \DomainException($error->message, $response->code);
		}

		return json_decode($response->body);
	}