argAddFileOut function
Implementation
void argAddFileOut(ArgParser argParser, {required bool isDocument}) {
argParser.addSeparator('IO settings');
argParser.addOption(
argNameOut,
abbr: 'o',
valueHelp: 'downloaded_${_resourceType(isDocument)}.json',
help:
'Path of the output file where the ${_resourceType(isDocument)} '
'JSON will be written. If omitted, STDOUT will be used.',
);
}