private com.google.protobuf.RepeatedFieldBuilderV3<
              com.google.cloud.tpu.v2alpha1.QueuedResource.Tpu.NodeSpec,
              com.google.cloud.tpu.v2alpha1.QueuedResource.Tpu.NodeSpec.Builder,
              com.google.cloud.tpu.v2alpha1.QueuedResource.Tpu.NodeSpecOrBuilder>
          getNodeSpecFieldBuilder() {
        if (nodeSpecBuilder_ == null) {
          nodeSpecBuilder_ =
              new com.google.protobuf.RepeatedFieldBuilderV3<
                  com.google.cloud.tpu.v2alpha1.QueuedResource.Tpu.NodeSpec,
                  com.google.cloud.tpu.v2alpha1.QueuedResource.Tpu.NodeSpec.Builder,
                  com.google.cloud.tpu.v2alpha1.QueuedResource.Tpu.NodeSpecOrBuilder>(
                  nodeSpec_, ((bitField0_ & 0x00000001) != 0), getParentForChildren(), isClean());
          nodeSpec_ = null;
        }
        return nodeSpecBuilder_;
      }
<pre>
The TPU node(s) being requested.
</pre>

<code>repeated .google.cloud.tpu.v2alpha1.QueuedResource.Tpu.NodeSpec node_spec = 1;</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/QueuedResource.java