mapOrNull<TResult extends Object?> method
- @optionalTypeArgs
- TResult? mentionRule(
- UFeedThreadgateAllowMentionRule value
- TResult? followerRule(
- UFeedThreadgateAllowFollowerRule value
- TResult? followingRule(
- UFeedThreadgateAllowFollowingRule value
- TResult? listRule(
- UFeedThreadgateAllowListRule value
- TResult? unknown(
- UFeedThreadgateAllowUnknown 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( UFeedThreadgateAllowMentionRule value)? mentionRule,TResult? Function( UFeedThreadgateAllowFollowerRule value)? followerRule,TResult? Function( UFeedThreadgateAllowFollowingRule value)? followingRule,TResult? Function( UFeedThreadgateAllowListRule value)? listRule,TResult? Function( UFeedThreadgateAllowUnknown value)? unknown,}){
final _that = this;
switch (_that) {
case UFeedThreadgateAllowMentionRule() when mentionRule != null:
return mentionRule(_that);case UFeedThreadgateAllowFollowerRule() when followerRule != null:
return followerRule(_that);case UFeedThreadgateAllowFollowingRule() when followingRule != null:
return followingRule(_that);case UFeedThreadgateAllowListRule() when listRule != null:
return listRule(_that);case UFeedThreadgateAllowUnknown() when unknown != null:
return unknown(_that);case _:
return null;
}
}