def get_document(self, id):
        """
        Retrieves a particular document from this project.
        """
        obj_list = self.document_list
        matches = [i for i in obj_list if str(i.id) == str(id)]
        if not matches:
            raise DoesNotExistError("The resource you've requested does not \
exist or is unavailable without the proper credentials.")
        return matches[0]
Retrieves a particular document from this project.