mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. _CreateTokenParamsLegacy value
    )?, {
  2. TResult? card(
    1. _CreateTokenParamsCard value
    )?,
  3. TResult? bankAccount(
    1. _CreateTokenParamsBankAccount value
    )?,
  4. TResult? pii(
    1. _CreateTokenParamsPII 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( _CreateTokenParamsLegacy value)?  $default,{TResult? Function( _CreateTokenParamsCard value)?  card,TResult? Function( _CreateTokenParamsBankAccount value)?  bankAccount,TResult? Function( _CreateTokenParamsPII value)?  pii,}){
final _that = this;
switch (_that) {
case _CreateTokenParamsLegacy() when $default != null:
return $default(_that);case _CreateTokenParamsCard() when card != null:
return card(_that);case _CreateTokenParamsBankAccount() when bankAccount != null:
return bankAccount(_that);case _CreateTokenParamsPII() when pii != null:
return pii(_that);case _:
  return null;

}
}