You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: config.go
    path of file: ./repos/juju/cmd/juju/config
    
    the code of the file until where you have to start completion: // Copyright 2022 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.

package config

import (
	"fmt"
	"io"
	"strings"

	"github.com/juju/cmd/v3"
	"github.com/juju/errors"
	"github.com/juju/gnuflag"
	"github.com/juju/utils/v3/keyvalues"
	"gopkg.in/yaml.v3"
)

// Action represents the action we want to perform here.
// The action will be set in Init, and then accessed by the child command's
// Run method to decide what to do.
t
    
func (c *ConfigCommandBase) parseResetKeys() error {
	for _, value := range c.reset {
		keys := strings.Split(strings.Trim(value, ","), ",")
		c.KeysToReset = append(c.KeysToReset, keys...)
	}

	for _, k := range c.KeysToReset {
		if sliceContains(c.CantReset, k) {
			return errors.Errorf("%q cannot be reset", k)
		}
		if strings.Contains(k, "=") {
			return errors.Errorf(
				`--reset accepts a comma delimited set of keys "a,b,c", received: %q`, k)
		}
	}
	return nil
}