private boolean canProvisionDynamically(NodeType hostType) {
        return nodeRepository.zone().cloud().dynamicProvisioning() &&
               (hostType == NodeType.host || hostType.isConfigServerHostLike());
    }
Ensure sufficient nodes are reserved or active for the given application, group and cluster

@param application        the application we are allocating to
@param cluster            the cluster and group we are allocating to
@param requested          a specification of the requested nodes
@return the list of nodes this cluster group will have allocated if activated
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/provisioning/Preparer.java