whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>({
  1. TResult? messageCreation(
    1. String type,
    2. RunStepDetailsMessageCreation messageCreation
    )?,
  2. TResult? toolCalls(
    1. String type,
    2. List<RunStepDetailsToolCalls> toolCalls
    )?,
})

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>({TResult? Function( String type, @JsonKey(name: 'message_creation')  RunStepDetailsMessageCreation messageCreation)?  messageCreation,TResult? Function( String type, @JsonKey(name: 'tool_calls')  List<RunStepDetailsToolCalls> toolCalls)?  toolCalls,}) {final _that = this;
switch (_that) {
case RunStepDetailsMessageCreationObject() when messageCreation != null:
return messageCreation(_that.type,_that.messageCreation);case RunStepDetailsToolCallsObject() when toolCalls != null:
return toolCalls(_that.type,_that.toolCalls);case _:
  return null;

}
}