code: func (c *EnvConfig) GoString() string {
  	if c == nil {
  		return "(*EnvConfig)(nil)"
  	}
  
  	return fmt.Sprintf("&EnvConfig{"+
  		"Blacklist:%v, "+
  		"Custom:%v, "+
  		"Pristine:%s, "+
  		"Whitelist:%v"+
  		"}",
  		c.Blacklist,
  		c.Custom,
  		BoolGoString(c.Pristine),
  		c.Whitelist,
  	)
  }
docs: // GoString defines the printable version of this struct.