NodeConfig: Parameters used in creating the cluster's nodes. See `nodeConfig` for the description of its properties. For requests, this field should only be used in lieu of a "node_pool" object, since this configuration (along with the "initial_node_count") will be used to create a "NodePool" object with an auto-generated name. Do not use this and a node_pool at the same time. For responses, this field will be populated with the node configuration of the first node pool. If unspecified, the defaults are used.