[Core] Add IsUncommon

Xamarin.PropertyEditing.Tests/MockPropertyInfo/MockBrushPropertyInfo.cs

@@ -35,6 +35,8 @@ namespace Xamarin.PropertyEditing.Tests.MockPropertyInfo
 
 		public bool CanWrite { get; }
 
+		public bool IsUncommon { get; }
+
 		public ValueSources ValueSources { get; }
 
 		public IReadOnlyList<PropertyVariationOption> Variations { get; }

Xamarin.PropertyEditing.Tests/MockPropertyInfo/MockPropertyInfo.cs

@@ -23,12 +23,13 @@ namespace Xamarin.PropertyEditing.Tests.MockPropertyInfo
 
 	public class MockPropertyInfo<T> : IPropertyInfo, IPropertyConverter, IEquatable<MockPropertyInfo<T>>
 	{
-		public MockPropertyInfo (string name, string description = null, string category = null, bool canWrite = true, IEnumerable<Type> converterTypes = null, ValueSources valueSources = ValueSources.Local | ValueSources.Default, PropertyVariationOption[] options = null)
+		public MockPropertyInfo (string name, string description = null, string category = null, bool canWrite = true, IEnumerable<Type> converterTypes = null, ValueSources valueSources = ValueSources.Local | ValueSources.Default, PropertyVariationOption[] options = null, bool isUncommon = false)
 		{
 			Name = name;
 			Description = description;
 			Category = category;
 			CanWrite = canWrite;
+			IsUncommon = isUncommon;
 			ValueSources = valueSources;
 			if (converterTypes != null) {
 				this.typeConverters = converterTypes
@@ -52,6 +53,7 @@ namespace Xamarin.PropertyEditing.Tests.MockPropertyInfo
 
 		public string Category { get; }
 		public bool CanWrite { get; }
+		public bool IsUncommon { get; }
 		public ValueSources ValueSources { get; }
 		static readonly PropertyVariationOption[] EmptyVariationOptions = new PropertyVariationOption[0];
 

Xamarin.PropertyEditing/IPropertyInfo.cs

@@ -32,6 +32,14 @@ namespace Xamarin.PropertyEditing
 
 		bool CanWrite { get; }
 
+		/// <summary>
+		/// Gets whether the property is an uncommonly used property.
+		/// </summary>
+		/// <remarks>
+		/// This acts as a hint to hide the property behind disclosures when appropriate.
+		/// </remarks>
+		bool IsUncommon { get; }
+
 		/// <summary>
 		/// Gets the possible sources of values for this property.
 		/// </summary>

Xamarin.PropertyEditing/Reflection/ReflectionPropertyInfo.cs

@@ -47,6 +47,8 @@ namespace Xamarin.PropertyEditing.Reflection
 
 		public bool CanWrite => this.propertyInfo.CanWrite;
 
+		public bool IsUncommon => false;
+
 		public ValueSources ValueSources => ValueSources.Local;
 
 		public IReadOnlyList<PropertyVariationOption> Variations => EmtpyVariationOptions;