public com.google.protobuf.ByteString getArgumentBytes() {
        java.lang.Object ref = argument_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
          argument_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<pre>
The name of the argument.

Tentatively [a-z]([_a-z0-9]*[a-z0-9])?, e.g., video, audio,
high_fps_frame.
</pre>

<code>string argument = 1;</code>

@return The bytes for argument.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/OperatorDefinition.java