code: function stringifyStackFrame(stackFrame, label) {
    var frameString = stackFrame.toString()
  
    // Colorize function name (or `label`, if provided).
    var lastSpaceIndex = frameString.lastIndexOf(' ')
    if (lastSpaceIndex !== -1) {
      return exports.colors.cyan(label || frameString.slice(0, lastSpaceIndex)) + frameString.slice(lastSpaceIndex)
    }
  
    // If there is no leading function, method, or type name (e.g., then root Node call: "node.js:405:3"), and `label` was provided.
    if (label) {
      return exports.colors.cyan(label) + ' ' + frameString
    }
  
    return frameString
  }
docs: Stringifies and colorizes the function name in `stackFrame`. If provided, `label` substitutes the function name in the `stackFrame` string representation.
  
  @private
  @static
  @param {CallSite} stackFrame The stack frame to stringify and stylize.
  @param {string} [label] The label that substitutes the function name in the `stackFrame` string representation.
  @returns {string} Returns the stylized string representation of `stackFrame`.