agent/dockerclient/dockerapi/types.go
func (cnferror ContainerNotFound) Error() string {
	return fmt.Sprintf("Could not find container '%s' in task '%s'",
		cnferror.ContainerName, cnferror.TaskArn)
}
func (cnferror ContainerNotFound) Error() string {
	return fmt.Sprintf("Could not find container '%s' in task '%s'",
		cnferror.ContainerName, cnferror.TaskArn)
}
// Error returns an error string for the ContainerNotFound error