whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. GlobalPubOptions globalPubOptions,
    2. bool offline,
    3. bool dryRun,
    4. bool precompile,
    5. bool tighten,
    6. bool unlockTransitive,
    7. bool majorVersions,
    )?
)

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( GlobalPubOptions globalPubOptions,  bool offline,  bool dryRun,  bool precompile,  bool tighten,  bool unlockTransitive,  bool majorVersions)?  $default,) {final _that = this;
switch (_that) {
case _PubUpgradeOptions() when $default != null:
return $default(_that.globalPubOptions,_that.offline,_that.dryRun,_that.precompile,_that.tighten,_that.unlockTransitive,_that.majorVersions);case _:
  return null;

}
}