public Builder mergeAcceleratorConfig(com.google.cloud.tpu.v2alpha1.AcceleratorConfig value) {
      if (acceleratorConfigBuilder_ == null) {
        if (((bitField0_ & 0x00400000) != 0)
            && acceleratorConfig_ != null
            && acceleratorConfig_
                != com.google.cloud.tpu.v2alpha1.AcceleratorConfig.getDefaultInstance()) {
          getAcceleratorConfigBuilder().mergeFrom(value);
        } else {
          acceleratorConfig_ = value;
        }
      } else {
        acceleratorConfigBuilder_.mergeFrom(value);
      }
      if (acceleratorConfig_ != null) {
        bitField0_ |= 0x00400000;
        onChanged();
      }
      return this;
    }
<pre>
The AccleratorConfig for the TPU Node.
</pre>

<code>.google.cloud.tpu.v2alpha1.AcceleratorConfig accelerator_config = 44;</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/Node.java