whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? firstName,
    2. String? lastName,
    3. String? displayName,
    4. String? dateOfBirth,
    5. String? gender,
    6. String? username,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( String? firstName,  String? lastName,  String? displayName,  String? dateOfBirth,  String? gender,  String? username)?  $default,) {final _that = this;
switch (_that) {
case _Profile() when $default != null:
return $default(_that.firstName,_that.lastName,_that.displayName,_that.dateOfBirth,_that.gender,_that.username);case _:
  return null;

}
}