/// <summary>
 /// Checks if view contains specified object
 /// </summary>
 /// <param name="value">
 /// Searched object <see cref="System.Object"/>
 /// </param>
 /// <returns>
 /// true if yes, false if not <see cref="System.Boolean"/>
 /// </returns>
 public bool Contains(object value)
 {
     return(items.Contains(value));
 }
 /// <summary>
 /// Checks if view contains specified object
 /// </summary>
 /// <param name="value">
 /// Searched object <see cref="T"/>
 /// </param>
 /// <returns>
 /// true if yes, false if not <see cref="System.Boolean"/>
 /// </returns>
 public bool Contains(T value)
 {
     return(items.Contains(value));
 }