mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? labels(
    1. ULabelSubscribeLabelsMessageLabels value
    )?,
  2. TResult? info(
    1. ULabelSubscribeLabelsMessageInfo value
    )?,
  3. TResult? unknown(
    1. ULabelSubscribeLabelsMessageUnknown 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( ULabelSubscribeLabelsMessageLabels value)?  labels,TResult? Function( ULabelSubscribeLabelsMessageInfo value)?  info,TResult? Function( ULabelSubscribeLabelsMessageUnknown value)?  unknown,}){
final _that = this;
switch (_that) {
case ULabelSubscribeLabelsMessageLabels() when labels != null:
return labels(_that);case ULabelSubscribeLabelsMessageInfo() when info != null:
return info(_that);case ULabelSubscribeLabelsMessageUnknown() when unknown != null:
return unknown(_that);case _:
  return null;

}
}