public Builder clearTraces() {
      bitField0_ = (bitField0_ & ~0x00000002);
      traces_ = null;
      if (tracesBuilder_ != null) {
        tracesBuilder_.dispose();
        tracesBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Required. The body of the message.
</pre>

<code>
.google.devtools.cloudtrace.v1.Traces traces = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-trace/proto-google-cloud-trace-v1/src/main/java/com/google/devtools/cloudtrace/v1/PatchTracesRequest.java