@java.lang.Override
      public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
        return super.clearOneof(oneof);
      }
<pre>
A set of attributes as key-value pairs.
</pre>

Protobuf type {@code google.devtools.cloudtrace.v2.Span.Attributes}
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/Span.java