booleansOptional method
Extracts an optional list of booleans.
Returns the list of booleans corresponding to the key
if it
exists, or null if it does not exist. Use the booleans method if the
key must always exist.
See booleans for more details.
Implementation
List<bool>? booleansOptional(String key,
{int? min, int? max, bool allowEmptyList = true}) =>
_listBoolean(key, allowEmptyList: allowEmptyList, optional: true);