DoesSNSNamespaceExist checks whether a namespace of a given name exists already in the cluster.

GetAllChildren returns a slice of all the descendants of a namespace or subnamespace, including it itself.

GetAncestor finds the nearest joint namespace of two subnamespaces in a hierarchy.

GetNamespaceSNSPointerAnnotation returns the sns-pointer annotation of a namespace.

GetRqDepthFromSNS returns the rq-depth of the root namespace based on a given subnamesapce.