ErrIfMissingRunRequirement returns an error when a command or its parent doesn't meet a requirement; for example, an on-prem command shouldn't be used by a cloud user.

ExecuteCommand runs the root command with the given args, and returns the output string or an error.

ExecuteCommandC runs the root command with the given args, and returns the executed command and the output string or an error.

NewValidArgsFunction is a wrapper around `cobra.ValidArgsFunction()` that ignores the `toComplete` argument and `ShellCompDirective` return value, which are almost always ignored and "NoFileComp", respectively.

RegisterFlagCompletionFunc is a wrapper around `cobra.RegisterFlagCompletionFunc()` that ignores the `toComplete` argument and `ShellCompDirective` return value, which are almost always ignored and "NoFileComp", respectively.

PreRun is the standard PreRunner implementation.

FlagResolver reads indirect flag values such as "-" for stdin pipe or "@file.txt" @ prefix.

PreRun is a helper class for automatically setting up Cobra PersistentPreRun commands.