How to use the apollo-engine-reporting-protobuf.Trace.Details function in apollo-engine-reporting-protobuf

export function makeTraceDetails(
  variables: Record,
  sendVariableValues?: VariableValueOptions,
  operationString?: string,
): Trace.Details {
  const details = new Trace.Details();
  const variablesToRecord = (() => {
    if (sendVariableValues && 'transform' in sendVariableValues) {
      const originalKeys = Object.keys(variables);
      try {
        // Custom function to allow user to specify what variablesJson will look like
        const modifiedVariables = sendVariableValues.transform({
          variables: variables,
          operationString: operationString,
        });
        return cleanModifiedVariables(originalKeys, modifiedVariables);
      } catch (e) {
        // If the custom function provided by the user throws an exception,
        // change all the variable values to an appropriate error message.
        return handleVariableValueTransformError(originalKeys);
      }
    } else {