The set of subcommands subcommandHelp knows about.
subcommandHelp
Kept as a union literal (not an array) because the subcommandHelp dispatcher needs an exhaustive switch on it; widening it would break the compiler's exhaustiveness check.
switch
The set of subcommands
subcommandHelpknows about.Kept as a union literal (not an array) because the
subcommandHelpdispatcher needs an exhaustiveswitchon it; widening it would break the compiler's exhaustiveness check.