@staticmethod
def __get_clusters(compute_environments):
    """
        Parse computeEnvironments object and return a list of ecsClusterArn.

        :param compute_environments: a list of Compute Environments
        :return: a list of ECS clusters
        """
    ecs_clusters = []
    for compute_env in compute_environments:
        ecs_clusters.append(compute_env['ecsClusterArn'])
    return ecs_clusters
