mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? richtextFacetMention(
    1. URichtextFacetFeaturesRichtextFacetMention value
    )?,
  2. TResult? richtextFacetLink(
    1. URichtextFacetFeaturesRichtextFacetLink value
    )?,
  3. TResult? richtextFacetTag(
    1. URichtextFacetFeaturesRichtextFacetTag value
    )?,
  4. TResult? unknown(
    1. URichtextFacetFeaturesUnknown 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( URichtextFacetFeaturesRichtextFacetMention value)?  richtextFacetMention,TResult? Function( URichtextFacetFeaturesRichtextFacetLink value)?  richtextFacetLink,TResult? Function( URichtextFacetFeaturesRichtextFacetTag value)?  richtextFacetTag,TResult? Function( URichtextFacetFeaturesUnknown value)?  unknown,}){
final _that = this;
switch (_that) {
case URichtextFacetFeaturesRichtextFacetMention() when richtextFacetMention != null:
return richtextFacetMention(_that);case URichtextFacetFeaturesRichtextFacetLink() when richtextFacetLink != null:
return richtextFacetLink(_that);case URichtextFacetFeaturesRichtextFacetTag() when richtextFacetTag != null:
return richtextFacetTag(_that);case URichtextFacetFeaturesUnknown() when unknown != null:
return unknown(_that);case _:
  return null;

}
}