CreateCategory.
        [Preview API]
        :param :class:`<ExtensionCategory> <azure.devops.v5_1.gallery.models.ExtensionCategory>` category:
        :rtype: :class:`<ExtensionCategory> <azure.devops.v5_1.gallery.models.ExtensionCategory>`

def create_category(self, category):
        """CreateCategory.
        [Preview API]
        :param :class:`<ExtensionCategory> <azure.devops.v5_1.gallery.models.ExtensionCategory>` category:
        :rtype: :class:`<ExtensionCategory> <azure.devops.v5_1.gallery.models.ExtensionCategory>`
        """
        content = self._serialize.body(category, 'ExtensionCategory')
        response = self._send(http_method='POST',
                              location_id='476531a3-7024-4516-a76a-ed64d3008ad6',
                              version='5.1-preview.1',
                              content=content)
        return self._deserialize('ExtensionCategory', response)