public Builder addAllNodeSpec(
          java.lang.Iterable<? extends com.google.cloud.tpu.v2.QueuedResource.Tpu.NodeSpec>
              values) {
        if (nodeSpecBuilder_ == null) {
          ensureNodeSpecIsMutable();
          com.google.protobuf.AbstractMessageLite.Builder.addAll(values, nodeSpec_);
          onChanged();
        } else {
          nodeSpecBuilder_.addAllMessages(values);
        }
        return this;
      }
<pre>
Optional. The TPU node(s) being requested.
</pre>

<code>
repeated .google.cloud.tpu.v2.QueuedResource.Tpu.NodeSpec node_spec = 1 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-tpu/proto-google-cloud-tpu-v2/src/main/java/com/google/cloud/tpu/v2/QueuedResource.java