clear method
Implementation
void clear(String name) {
final state = _fields[name] as JarFieldState;
_updateField(name, state.copyWith(value: null, error: null, isDirty: true));
}
void clear(String name) {
final state = _fields[name] as JarFieldState;
_updateField(name, state.copyWith(value: null, error: null, isDirty: true));
}