@java.lang.Override
      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
          internalGetFieldAccessorTable() {
        return com.google.devtools.cloudtrace.v2.TraceProto
            .internal_static_google_devtools_cloudtrace_v2_Span_Link_fieldAccessorTable
            .ensureFieldAccessorsInitialized(
                com.google.devtools.cloudtrace.v2.Span.Link.class,
                com.google.devtools.cloudtrace.v2.Span.Link.Builder.class);
      }
<pre>
A pointer from the current span to another span in the same trace or in a
different trace. For example, this can be used in batching operations,
where a single batch handler processes multiple requests from different
traces or when the handler receives a request from a different project.
</pre>

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