mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? imageDetails(
    1. UBlobViewDetailsImageDetails value
    )?,
  2. TResult? videoDetails(
    1. UBlobViewDetailsVideoDetails value
    )?,
  3. TResult? unknown(
    1. UBlobViewDetailsUnknown 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( UBlobViewDetailsImageDetails value)?  imageDetails,TResult? Function( UBlobViewDetailsVideoDetails value)?  videoDetails,TResult? Function( UBlobViewDetailsUnknown value)?  unknown,}){
final _that = this;
switch (_that) {
case UBlobViewDetailsImageDetails() when imageDetails != null:
return imageDetails(_that);case UBlobViewDetailsVideoDetails() when videoDetails != null:
return videoDetails(_that);case UBlobViewDetailsUnknown() when unknown != null:
return unknown(_that);case _:
  return null;

}
}