@NotEmptyThe @NotEmpty annotation may be applied to fields annotated with @Option and @Arguments to require that the value given not be an empty string e.g.
@Option(name = "--reference", arity = 1)
@NotEmpty
private String reference;
Restricts the --reference option to strings which are not empty strings
If you want to require a value that is not all whitespace then @NotBlank would be suitable.
This documentation is itself open source and lives in GitHub under the docs/ directory.
I am not a professional technical writer and as the developer of this software I can often make assumptions of
knowledge that you as a user reading this may not have. Improvements to the documentation are always welcome, if you
have suggestions for the documentation please submit pull requests to the main branch.