mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? legacy(
    1. CompiledMessageLegacy value
    )?,
  2. TResult? v0(
    1. CompiledMessageV0 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( CompiledMessageLegacy value)?  legacy,TResult? Function( CompiledMessageV0 value)?  v0,}){
final _that = this;
switch (_that) {
case CompiledMessageLegacy() when legacy != null:
return legacy(_that);case CompiledMessageV0() when v0 != null:
return v0(_that);case _:
  return null;

}
}