def get(self, collection_id):
        """
        Retrieve a single collection.
        To view a user’s private collections, the 'read_collections' scope is required.

        :param collection_id [string]: The collections’s ID. Required.
        :return: [Collection]: The Unsplash Collection.
        """
        url = "/collections/%s" % collection_id
        result = self._get(url)
        return CollectionModel.parse(result)