@java.lang.Override
      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
          internalGetFieldAccessorTable() {
        return com.google.devtools.cloudtrace.v2.TraceProto
            .internal_static_google_devtools_cloudtrace_v2_Span_Attributes_fieldAccessorTable
            .ensureFieldAccessorsInitialized(
                com.google.devtools.cloudtrace.v2.Span.Attributes.class,
                com.google.devtools.cloudtrace.v2.Span.Attributes.Builder.class);
      }
<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