private com.google.protobuf.SingleFieldBuilderV3<
            com.google.devtools.cloudtrace.v2.TruncatableString,
            com.google.devtools.cloudtrace.v2.TruncatableString.Builder,
            com.google.devtools.cloudtrace.v2.TruncatableStringOrBuilder>
        getModuleFieldBuilder() {
      if (moduleBuilder_ == null) {
        moduleBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.devtools.cloudtrace.v2.TruncatableString,
                com.google.devtools.cloudtrace.v2.TruncatableString.Builder,
                com.google.devtools.cloudtrace.v2.TruncatableStringOrBuilder>(
                getModule(), getParentForChildren(), isClean());
        module_ = null;
      }
      return moduleBuilder_;
    }
<pre>
For example: main binary, kernel modules, and dynamic libraries
such as libc.so, sharedlib.so (up to 256 bytes).
</pre>

<code>.google.devtools.cloudtrace.v2.TruncatableString module = 1;</code>
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/Module.java