The function checks whether the cluster is running on the cloud. It returns
TRUE if the cluster specific to the value from .getJobQueueName(cluster) exists.
The default method always returns FALSE
dockerClusterExists(provider, cluster, verbose)# S4 method for ANY
dockerClusterExists(provider, cluster, verbose)
S4 CloudProvider object. The service provider.
S4 DockerCluster object.
Integer. The verbose level, default 1.
A logical value
dockerClusterExists,ANY-method: The default method, it always returns FALSE.