mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? joinLinkPreviewView(
    1. UGroupGetJoinLinkPreviewsJoinLinkPreviewsJoinLinkPreviewView value
    )?,
  2. TResult? disabledJoinLinkPreviewView(
    1. UGroupGetJoinLinkPreviewsJoinLinkPreviewsDisabledJoinLinkPreviewView value
    )?,
  3. TResult? invalidJoinLinkPreviewView(
    1. UGroupGetJoinLinkPreviewsJoinLinkPreviewsInvalidJoinLinkPreviewView value
    )?,
  4. TResult? unknown(
    1. UGroupGetJoinLinkPreviewsJoinLinkPreviewsUnknown 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( UGroupGetJoinLinkPreviewsJoinLinkPreviewsJoinLinkPreviewView value)?  joinLinkPreviewView,TResult? Function( UGroupGetJoinLinkPreviewsJoinLinkPreviewsDisabledJoinLinkPreviewView value)?  disabledJoinLinkPreviewView,TResult? Function( UGroupGetJoinLinkPreviewsJoinLinkPreviewsInvalidJoinLinkPreviewView value)?  invalidJoinLinkPreviewView,TResult? Function( UGroupGetJoinLinkPreviewsJoinLinkPreviewsUnknown value)?  unknown,}){
final _that = this;
switch (_that) {
case UGroupGetJoinLinkPreviewsJoinLinkPreviewsJoinLinkPreviewView() when joinLinkPreviewView != null:
return joinLinkPreviewView(_that);case UGroupGetJoinLinkPreviewsJoinLinkPreviewsDisabledJoinLinkPreviewView() when disabledJoinLinkPreviewView != null:
return disabledJoinLinkPreviewView(_that);case UGroupGetJoinLinkPreviewsJoinLinkPreviewsInvalidJoinLinkPreviewView() when invalidJoinLinkPreviewView != null:
return invalidJoinLinkPreviewView(_that);case UGroupGetJoinLinkPreviewsJoinLinkPreviewsUnknown() when unknown != null:
return unknown(_that);case _:
  return null;

}
}