public Builder mergeFrom(com.google.devtools.cloudtrace.v1.Traces other) {
      if (other == com.google.devtools.cloudtrace.v1.Traces.getDefaultInstance()) return this;
      if (tracesBuilder_ == null) {
        if (!other.traces_.isEmpty()) {
          if (traces_.isEmpty()) {
            traces_ = other.traces_;
            bitField0_ = (bitField0_ & ~0x00000001);
          } else {
            ensureTracesIsMutable();
            traces_.addAll(other.traces_);
          }
          onChanged();
        }
      } else {
        if (!other.traces_.isEmpty()) {
          if (tracesBuilder_.isEmpty()) {
            tracesBuilder_.dispose();
            tracesBuilder_ = null;
            traces_ = other.traces_;
            bitField0_ = (bitField0_ & ~0x00000001);
            tracesBuilder_ =
                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                    ? getTracesFieldBuilder()
                    : null;
          } else {
            tracesBuilder_.addAllMessages(other.traces_);
          }
        }
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }
<pre>
List of new or updated traces.
</pre>

Protobuf type {@code google.devtools.cloudtrace.v1.Traces}
java-trace/proto-google-cloud-trace-v1/src/main/java/com/google/devtools/cloudtrace/v1/Traces.java