public Builder mergeFrom(com.google.cloud.tpu.v2.QueuedResource.Tpu other) {
        if (other == com.google.cloud.tpu.v2.QueuedResource.Tpu.getDefaultInstance()) return this;
        if (nodeSpecBuilder_ == null) {
          if (!other.nodeSpec_.isEmpty()) {
            if (nodeSpec_.isEmpty()) {
              nodeSpec_ = other.nodeSpec_;
              bitField0_ = (bitField0_ & ~0x00000001);
            } else {
              ensureNodeSpecIsMutable();
              nodeSpec_.addAll(other.nodeSpec_);
            }
            onChanged();
          }
        } else {
          if (!other.nodeSpec_.isEmpty()) {
            if (nodeSpecBuilder_.isEmpty()) {
              nodeSpecBuilder_.dispose();
              nodeSpecBuilder_ = null;
              nodeSpec_ = other.nodeSpec_;
              bitField0_ = (bitField0_ & ~0x00000001);
              nodeSpecBuilder_ =
                  com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                      ? getNodeSpecFieldBuilder()
                      : null;
            } else {
              nodeSpecBuilder_.addAllMessages(other.nodeSpec_);
            }
          }
        }
        this.mergeUnknownFields(other.getUnknownFields());
        onChanged();
        return this;
      }
<pre>
Details of the TPU resource(s) being requested.
</pre>

Protobuf type {@code google.cloud.tpu.v2.QueuedResource.Tpu}
java-tpu/proto-google-cloud-tpu-v2/src/main/java/com/google/cloud/tpu/v2/QueuedResource.java