# Functions
NewListOpts creates a new ListOpts with the specified validator.
NewListOptsRef creates a new ListOpts with the specified values and validator.
NewMapOpts creates a new MapOpts with the specified map of values and a validator.
NewMapOptsRef creates a new MapOpts with the specified values and validator.
ValidateEnv validates an environment variable and returns it.
# Type aliases
ValidatorFunc defines a validator function that returns a validated string and/or an error.