isSelected method

bool isSelected(
  1. dynamic o
)

Check selection status of an option. Return true if the option selected. Which option to check can be defined by the index (String) or by the option (T) object itself.

This will check and enforce mode constraint.

Implementation

bool isSelected(dynamic o) {
  assert(o is String || o is T);
  if (o is T) o = indexGetter(o);

  return _constrainedSelected().contains(o);
}