':calls: `POST /repos/:owner/:repo/pulls/:number/comments <http://developer.github.com/v3/pulls/comments>`_
:param body: string
:param commit_id: :class:`github.Commit.Commit`
:param path: string
:param position: integer
:rtype: :class:`github.PullRequestComment.PullRequestComment`'

def create_review_comment(self, body, commit_id, path, position):

    assert isinstance(body, (str, unicode)), body
    assert isinstance(commit_id, github.Commit.Commit), commit_id
    assert isinstance(path, (str, unicode)), path
    assert isinstance(position, (int, long)), position
    post_parameters = {'body': body, 'commit_id': commit_id._identity, 'path': path, 'position': position}
    (headers, data) = self._requester.requestJsonAndCheck('POST', (self.url + '/comments'), input=post_parameters)
    return github.PullRequestComment.PullRequestComment(self._requester, headers, data, completed=True)
