@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (((bitField0_ & 0x00000001) != 0)) {
        output.writeMessage(1, getFunctionName());
      }
      if (((bitField0_ & 0x00000002) != 0)) {
        output.writeMessage(2, getOriginalFunctionName());
      }
      if (((bitField0_ & 0x00000004) != 0)) {
        output.writeMessage(3, getFileName());
      }
      if (lineNumber_ != 0L) {
        output.writeInt64(4, lineNumber_);
      }
      if (columnNumber_ != 0L) {
        output.writeInt64(5, columnNumber_);
      }
      if (((bitField0_ & 0x00000008) != 0)) {
        output.writeMessage(6, getLoadModule());
      }
      if (((bitField0_ & 0x00000010) != 0)) {
        output.writeMessage(7, getSourceVersion());
      }
      getUnknownFields().writeTo(output);
    }
<pre>
The version of the deployed source code (up to 128 bytes).
</pre>

<code>.google.devtools.cloudtrace.v2.TruncatableString source_version = 7;</code>
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/StackTrace.java