mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? googlePay(
    1. PlatformPayConfirmParamsGooglePay value
    )?,
  2. TResult? applePay(
    1. PlatformPayConfirmParamsApplePay value
    )?,
  3. TResult? web(
    1. PlatformPayConfirmParamsWeb 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( PlatformPayConfirmParamsGooglePay value)?  googlePay,TResult? Function( PlatformPayConfirmParamsApplePay value)?  applePay,TResult? Function( PlatformPayConfirmParamsWeb value)?  web,}){
final _that = this;
switch (_that) {
case PlatformPayConfirmParamsGooglePay() when googlePay != null:
return googlePay(_that);case PlatformPayConfirmParamsApplePay() when applePay != null:
return applePay(_that);case PlatformPayConfirmParamsWeb() when web != null:
return web(_that);case _:
  return null;

}
}