public function getFeedPost($channelIdentifier, $postId, $accessToken, $comments = 5)
    {
        if ($this->apiVersionIsGreaterThanV3() && !is_numeric($channelIdentifier)) {
            throw new InvalidIdentifierException('channel');
        }

        if (!is_string($postId)) {
            throw new InvalidTypeException('Post ID', 'string', gettype($postId));
        }

        if (!is_int($comments)) {
            throw new InvalidTypeException('Comments', 'integer', gettype($comments));
        }

        $params = [
            'comments' => $comments,
        ];

        return $this->get(sprintf('feed/%s/posts/%s', $channelIdentifier, $postId), $params, $accessToken);
    }