mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? getLink(
    1. _GetLink value
    )?,
  2. TResult? getInvoiceStatus(
    1. _GetInvoiceStatus value
    )?,
})

A variant of map that fallback to returning null.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult? mapOrNull<TResult extends Object?>({TResult? Function( _GetLink value)?  getLink,TResult? Function( _GetInvoiceStatus value)?  getInvoiceStatus,}){
final _that = this;
switch (_that) {
case _GetLink() when getLink != null:
return getLink(_that);case _GetInvoiceStatus() when getInvoiceStatus != null:
return getInvoiceStatus(_that);case _:
  return null;

}
}