Hi. I write a simple Inline function.

[Category(ResourceNameHelper.ResourceName, "IntegrationCategory", typeof(UserInfo))]
        public class UserInfo
        {
            /DisplayName(ResourceNameHelper.ResourceName, "GetUserPrifile", typeof(UserInfo)),
             Description(ResourceNameHelper.ResourceName, "GetUserPrifile", typeof(UserInfo))]
            public static bool GetUserPrifile(long requestId, out string errorMessage)
            {
                try
                {
                    if (!K2IntegrationWrapper.GetUserProfile(requestId, out errorMessage))
                        return true;
                }
                catch (Exception ex)
                {
                    errorMessage = ex.Message;
                    return true;
                }
                return false;
            }
        }

In K2 Designer i can't use this function. It wait such parameters: long, string&. But i don't know how to give it "string&" parameter