CreateFavorite.
        [Preview API] Creates a ref favorite
        :param :class:`<GitRefFavorite> <azure.devops.v5_0.git.models.GitRefFavorite>` favorite: The ref favorite to create.
        :param str project: Project ID or project name
        :rtype: :class:`<GitRefFavorite> <azure.devops.v5_0.git.models.GitRefFavorite>`

def create_favorite(self, favorite, project):
        """CreateFavorite.
        [Preview API] Creates a ref favorite
        :param :class:`<GitRefFavorite> <azure.devops.v5_0.git.models.GitRefFavorite>` favorite: The ref favorite to create.
        :param str project: Project ID or project name
        :rtype: :class:`<GitRefFavorite> <azure.devops.v5_0.git.models.GitRefFavorite>`
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        content = self._serialize.body(favorite, 'GitRefFavorite')
        response = self._send(http_method='POST',
                              location_id='876f70af-5792-485a-a1c7-d0a7b2f42bbb',
                              version='5.0-preview.1',
                              route_values=route_values,
                              content=content)
        return self._deserialize('GitRefFavorite', response)