@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (principalCase_ == 1) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, principal_);
    }
    if (principalCase_ == 2) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, principal_);
    }
    getUnknownFields().writeTo(output);
  }
<pre>
The service account which needs to be granted the permission.
</pre>

<code>string service_account = 2;</code>

@return The bytes for serviceAccount.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/Principal.java