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

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

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

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