}
		}

		// if the registered flag implements config.Value, and is a non-string type, we can do fancy custom parsing
		cfgValue, isCfgVal := f.Value.(Value)
		if cfgMap := parent.Map(key); isCfgVal && len(cfgMap) > 0 {
			err = cfgValue.SetConfig(cfgMap)
		} else if cfgSlice := parent.Slice(key); isCfgVal && len(cfgSlice) > 0 {
			err = cfgValue.SetConfig(cfgSlice)
		} else if v := parent.String(key); v != "" {