/// <summary>
/// Gets the entry of registration of activity according specified ModelItem object.
/// </summary>
/// <param name="item">The specified ModelItem object.</param>
/// <returns>The entry of registration of activity represented by the specified ModelItem object.</returns>
public static ActivityEntry GetActivityEntry(this ModelItem item)
{
RuleEditingContext context = item.GetRuleEditingContext();
RuleManager ruleManager = context.GetRuleSignature().Owner;
RuleActivityManager activityManager = ruleManager.ActivityManager;
ActivityEntry entry = activityManager.GetEntry(item.ItemType);
return(entry);
}