whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>({
  1. TResult? accountHosting(
    1. AccountHosting data
    )?,
  2. TResult? recordHosting(
    1. RecordHosting data
    )?,
  3. TResult? unknown(
    1. Map<String, dynamic> data
    )?,
})

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( AccountHosting data)?  accountHosting,TResult? Function( RecordHosting data)?  recordHosting,TResult? Function( Map<String, dynamic> data)?  unknown,}) {final _that = this;
switch (_that) {
case USubjectStatusViewHostingAccountHosting() when accountHosting != null:
return accountHosting(_that.data);case USubjectStatusViewHostingRecordHosting() when recordHosting != null:
return recordHosting(_that.data);case USubjectStatusViewHostingUnknown() when unknown != null:
return unknown(_that.data);case _:
  return null;

}
}