Optional ReadonlyclusterThe cluster argument prefix. If not present, cluster letters will not appear in usage statements.
Optional ReadonlyoptionThe option filter. If not present, all options will be included respecting the order of their definitions.
Optional ReadonlypositionalThe marker(s) to delimit positional arguments (e.g. '--').
If not present, no marker will appear in usage statements.
Optional ReadonlyprogramThe program name. If not present or empty, usage statements will contain no program name.
Optional ReadonlystdinThe symbol for the standard input (e.g., '-').
If not present, the standard input will not appear in usage statements.
The formatter flags.