public Builder clearNodeSpec() {
        if (nodeSpecBuilder_ == null) {
          nodeSpec_ = java.util.Collections.emptyList();
          bitField0_ = (bitField0_ & ~0x00000001);
          onChanged();
        } else {
          nodeSpecBuilder_.clear();
        }
        return this;
      }
<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