src/node.js
/**
   * Add colors, style to string
   * @private
   */
Add colors, style to string
@private
Add colors style to string @private
_color (str, color, isBold) {
    return !this.opts.colors
      ? str
      : isBold
        ? color.bold(str)
        : color(str)
  }
_color ( str , color , isBold ) { return ! this . opts . colors ? str : isBold ? color . bold ( str ) : color ( str ) }
Add colors, style to string
 @private
Add colors style to string @private