'Retrieves information about the collections within a given environment
:param environment_id: this is the guid of a valid environment
:return: json results of the collections in an environment'

def list_collections(self, environment_id):

    url_string = '/v1/environments/{0}/collections'.format(environment_id)
    return self.request(method='GET', url=url_string, params={'version': self.version}, accept_json=True)
