namespace Microsoft.AspNetCore.Mvc.ModelBinding.Validation
{
    [DebuggerDisplay("Count = {Count}")]
    [DebuggerTypeProxy(typeof(DictionaryDebugView<object, ValidationStateEntry>))]
    [DefaultMember("Item")]
    public class ValidationStateDictionary : ICollection<KeyValuePair<object!, ValidationStateEntry!>>, IDictionary<object!, ValidationStateEntry!>, IEnumerable, IEnumerable<KeyValuePair<object!, ValidationStateEntry!>>, IReadOnlyCollection<KeyValuePair<object!, ValidationStateEntry!>>, IReadOnlyDictionary<object!, ValidationStateEntry!>
    {
        public bool ContainsKey(object! key);
    }
}