@java.lang.Override
    public int getSerializedSize() {
      int size = memoizedSize;
      if (size != -1) return size;

      size = 0;
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(kmsKey_)) {
        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, kmsKey_);
      }
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(kmsKeyServiceAccount_)) {
        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, kmsKeyServiceAccount_);
      }
      size += getUnknownFields().getSerializedSize();
      memoizedSize = size;
      return size;
    }
<pre>
Immutable. The service account to use with the specified
KMS key. We recommend that you use a separate service account
and follow KMS best practices. For more information, see
[Separation of
duties](https://cloud.google.com/kms/docs/separation-of-duties) and
`gcloud kms keys add-iam-policy-binding`
[`--member`](https://cloud.google.com/sdk/gcloud/reference/kms/keys/add-iam-policy-binding#--member).
</pre>

<code>string kms_key_service_account = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>

@return The bytes for kmsKeyServiceAccount.
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationConfig.java