return runList(c.OutOrStdout())
		},
	}
	return listCmd
}

func runList(writer io.Writer) error {
	// Sort flag names
	keys := make([]string, len(settableFlags))
	i := 0
	for key := range settableFlags {
		keys[i] = key
		i++
	}
	sort.Strings(keys)
	w := new(tabwriter.Writer).Init(writer, 0, 8, 5, ' ', 0)
	fmt.Fprintf(w, "FLAG\tVALUE\tFROM\n")
	for _, flag := range keys {

			b.WriteString(KvSpaceSeparator)
			b.WriteString(ep.Name)
			b.WriteString(EnvSeparator)
			b.WriteString(ep.Value)
			b.WriteString(KvNewline)
		}
	}
}

// WriteTo writes the string representation of the configuration to the given
// builder. When off is true, adds a comment character before the config system
// output. It also ignores values when empty and deprecated.