def create_card(self, note=github.GithubObject.NotSet,
                    content_id=github.GithubObject.NotSet,
                    content_type=github.GithubObject.NotSet):
        """
        :calls: `POST /projects/columns/:column_id/cards <https://developer.github.com/v3/projects/cards/#create-a-project-card>`_
        :param note: string
        :param content_id: integer
        :param content_type: string
        """
        post_parameters = {}
        if isinstance(note, (str, unicode)):
            assert content_id is github.GithubObject.NotSet, content_id
            assert content_type is github.GithubObject.NotSet, content_type
            post_parameters = {"note": note}
        else:
            assert note is github.GithubObject.NotSet, note
            assert isinstance(content_id, int), content_id
            assert isinstance(content_type, (str, unicode)), content_type
            post_parameters = {"content_id": content_id,
                               "content_type": content_type}

        import_header = {"Accept": Consts.mediaTypeProjectsPreview}
        headers, data = self._requester.requestJsonAndCheck(
            "POST",
            self.url + "/cards",
            headers=import_header,
            input=post_parameters
        )
        return github.ProjectCard.ProjectCard(self._requester, headers,
                                              data, completed=True)
:calls: `POST /projects/columns/:column_id/cards <https://developer.github.com/v3/projects/cards/#create-a-project-card>`_
        :param note: string
        :param content_id: integer
        :param content_type: string