whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>({ TResult? response(String content, String toolCallId, String? customSessionId, String? toolName, String? toolType,)?, TResult? error(String error, String toolCallId, String? code, String? content, String? customSessionId, String? level, String? toolType,)?, })

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 content,  String toolCallId,  String? customSessionId,  String? toolName,  String? toolType)?  response,TResult? Function( String error,  String toolCallId,  String? code,  String? content,  String? customSessionId,  String? level,  String? toolType)?  error,}) {final _that = this;
switch (_that) {
case _ToolResponse() when response != null:
return response(_that.content,_that.toolCallId,_that.customSessionId,_that.toolName,_that.toolType);case _ToolError() when error != null:
return error(_that.error,_that.toolCallId,_that.code,_that.content,_that.customSessionId,_that.level,_that.toolType);case _:
  return null;

}
}