getString(functionName) {
    if (functionName) {
      return this.getStringFromFunctionNames(this.traceFunctionCalls(functionName).reverse());
    }
    return this.getStringFromFunctionNames(Object.keys(this.functionMap));
  }
@desc Get string for a particular function name
@param {String} functionName - Function name to trace from. If null, it returns the WHOLE builder stack
@returns {String} settings - The string, of all the various functions. Trace optimized if functionName given