mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? embedImagesView(
    1. UEmbedRecordViewRecordEmbedsEmbedImagesView value
    )?,
  2. TResult? embedVideoView(
    1. UEmbedRecordViewRecordEmbedsEmbedVideoView value
    )?,
  3. TResult? embedExternalView(
    1. UEmbedRecordViewRecordEmbedsEmbedExternalView value
    )?,
  4. TResult? embedRecordView(
    1. UEmbedRecordViewRecordEmbedsEmbedRecordView value
    )?,
  5. TResult? embedRecordWithMediaView(
    1. UEmbedRecordViewRecordEmbedsEmbedRecordWithMediaView value
    )?,
  6. TResult? unknown(
    1. UEmbedRecordViewRecordEmbedsUnknown 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( UEmbedRecordViewRecordEmbedsEmbedImagesView value)?  embedImagesView,TResult? Function( UEmbedRecordViewRecordEmbedsEmbedVideoView value)?  embedVideoView,TResult? Function( UEmbedRecordViewRecordEmbedsEmbedExternalView value)?  embedExternalView,TResult? Function( UEmbedRecordViewRecordEmbedsEmbedRecordView value)?  embedRecordView,TResult? Function( UEmbedRecordViewRecordEmbedsEmbedRecordWithMediaView value)?  embedRecordWithMediaView,TResult? Function( UEmbedRecordViewRecordEmbedsUnknown value)?  unknown,}){
final _that = this;
switch (_that) {
case UEmbedRecordViewRecordEmbedsEmbedImagesView() when embedImagesView != null:
return embedImagesView(_that);case UEmbedRecordViewRecordEmbedsEmbedVideoView() when embedVideoView != null:
return embedVideoView(_that);case UEmbedRecordViewRecordEmbedsEmbedExternalView() when embedExternalView != null:
return embedExternalView(_that);case UEmbedRecordViewRecordEmbedsEmbedRecordView() when embedRecordView != null:
return embedRecordView(_that);case UEmbedRecordViewRecordEmbedsEmbedRecordWithMediaView() when embedRecordWithMediaView != null:
return embedRecordWithMediaView(_that);case UEmbedRecordViewRecordEmbedsUnknown() when unknown != null:
return unknown(_that);case _:
  return null;

}
}