@java.lang.Override
        public Builder clear() {
          super.clear();
          bitField0_ = 0;
          parent_ = "";
          nodeId_ = "";
          multiNodeParams_ = null;
          if (multiNodeParamsBuilder_ != null) {
            multiNodeParamsBuilder_.dispose();
            multiNodeParamsBuilder_ = null;
          }
          node_ = null;
          if (nodeBuilder_ != null) {
            nodeBuilder_.dispose();
            nodeBuilder_ = null;
          }
          return this;
        }
<pre>
Details of the TPU node(s) being requested. Users can request either a
single node or multiple nodes.
NodeSpec provides the specification for node(s) to be created.
</pre>

Protobuf type {@code google.cloud.tpu.v2alpha1.QueuedResource.Tpu.NodeSpec}
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/QueuedResource.java