public Builder mergeIdentity(com.google.cloud.tpu.v2alpha1.ServiceIdentity value) {
      if (identityBuilder_ == null) {
        if (((bitField0_ & 0x00000001) != 0)
            && identity_ != null
            && identity_ != com.google.cloud.tpu.v2alpha1.ServiceIdentity.getDefaultInstance()) {
          getIdentityBuilder().mergeFrom(value);
        } else {
          identity_ = value;
        }
      } else {
        identityBuilder_.mergeFrom(value);
      }
      if (identity_ != null) {
        bitField0_ |= 0x00000001;
        onChanged();
      }
      return this;
    }
<pre>
ServiceIdentity that was created or retrieved.
</pre>

<code>.google.cloud.tpu.v2alpha1.ServiceIdentity identity = 1;</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/GenerateServiceIdentityResponse.java