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: commands.go
    path of file: ./repos/sliver/client/command/environment
    
    the code of the file until where you have to start completion: package environment

import (
	"github.com/rsteube/carapace"
	"github.com/spf13/cobra"
	"github.com/spf13/pflag"

	"github.com/bishopfox/sliver/client/command/flags"
	"github.com/bishopfox/sliver/client/command/help"
	"github.com/bishopfox/sliver/client/console"
	consts "github.com/bishopfox/sliver/client/constants"
)

// Commands returns the â€œ command and its subcommands.
func Commands(con *console.SliverClient) []*cobra.Command {
	envCmd := &cobra.Command{
		Use:   consts.EnvStr,
		Short: "List environment variables",
		Long:  help.GetHelpFor([]string{consts.EnvStr}),
		Args:  cobra.RangeArgs(0, 1),
		Run: func(cmd *cobra.Command, args []string) {
			EnvGetCmd(cmd, con, args)
		},
		GroupID: consts.InfoHelpGroup,
	}
	flags.Bind("", true, envCmd, func(f *pflag.FlagSet) {
		f.Int64P("timeout", "t", flags.DefaultTimeout, "grpc timeout in seconds")
	})
	carapace.Gen(
    
func Commands(con *console.SliverClient) []*cobra.Command {
	envCmd := &cobra.Command{
		Use:   consts.EnvStr,
		Short: "List environment variables",
		Long:  help.GetHelpFor([]string{consts.EnvStr}),
		Args:  cobra.RangeArgs(0, 1),
		Run: func(cmd *cobra.Command, args []string) {
			EnvGetCmd(cmd, con, args)
		},
		GroupID: consts.InfoHelpGroup,
	}
	flags.Bind("", true, envCmd, func(f *pflag.FlagSet) {
		f.Int64P("timeout", "t", flags.DefaultTimeout, "grpc timeout in seconds")
	})
	carapace.Gen(envCmd).PositionalCompletion(carapace.ActionValues().Usage("environment variable to fetch (optional)"))

	envSetCmd := &cobra.Command{
		Use:   consts.SetStr,
		Short: "Set environment variables",
		Long:  help.GetHelpFor([]string{consts.EnvStr, consts.SetStr}),
		Args:  cobra.ExactArgs(2),
		Run: func(cmd *cobra.Command, args []string) {
			EnvSetCmd(cmd, con, args)
		},
	}
	envCmd.AddCommand(envSetCmd)
	carapace.Gen(envSetCmd).PositionalCompletion(
		carapace.ActionValues().Usage("environment variable name"),
		carapace.ActionValues().Usage("value to assign"),
	)

	envUnsetCmd := &cobra.Command{
		Use:   consts.UnsetStr,
		Short: "Clear environment variables",
		Long:  help.GetHelpFor([]string{consts.EnvStr, consts.UnsetStr}),
		Args:  cobra.ExactArgs(1),
		Run: func(cmd *cobra.Command, args []string) {
			EnvUnsetCmd(cmd, con, args)
		},
	}
	envCmd.AddCommand(envUnsetCmd)
	carapace.Gen(envUnsetCmd).PositionalCompletion(carapace.ActionValues().Usage("environment variable name"))

	return []*cobra.Command{envCmd}
}