mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? directConvoMember(
    1. UProfileViewBasicKindDirectConvoMember value
    )?,
  2. TResult? groupConvoMember(
    1. UProfileViewBasicKindGroupConvoMember value
    )?,
  3. TResult? pastGroupConvoMember(
    1. UProfileViewBasicKindPastGroupConvoMember value
    )?,
  4. TResult? unknown(
    1. UProfileViewBasicKindUnknown 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( UProfileViewBasicKindDirectConvoMember value)?  directConvoMember,TResult? Function( UProfileViewBasicKindGroupConvoMember value)?  groupConvoMember,TResult? Function( UProfileViewBasicKindPastGroupConvoMember value)?  pastGroupConvoMember,TResult? Function( UProfileViewBasicKindUnknown value)?  unknown,}){
final _that = this;
switch (_that) {
case UProfileViewBasicKindDirectConvoMember() when directConvoMember != null:
return directConvoMember(_that);case UProfileViewBasicKindGroupConvoMember() when groupConvoMember != null:
return groupConvoMember(_that);case UProfileViewBasicKindPastGroupConvoMember() when pastGroupConvoMember != null:
return pastGroupConvoMember(_that);case UProfileViewBasicKindUnknown() when unknown != null:
return unknown(_that);case _:
  return null;

}
}