QuickInfo test TestNestedAnonymousType is skipped due to a PROTOTYPE comment

[AlekseyTs]

        // PROTOTYPE(NullableReferenceTypes): 
        [WorkItem(543873, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/543873")]
        [Fact(Skip = "PROTOTYPE(NullableReferenceTypes)"), Trait(Traits.Feature, Traits.Features.QuickInfo)]
        public async Task TestNestedAnonymousType()
        {
            // verify nested anonymous types are listed in the same order for different properties
            // verify first property
            await TestInMethodAsync(
@"var x = new[] { new { Name = ""BillG"", Address = new { Street = ""1 Microsoft Way"", Zip = ""98052"" } } };

x[0].$$Address",
                MainDescription(@"'b 'a.Address { get; }"),
                NoTypeParameterMap,
                AnonymousTypes(
$@"
{FeaturesResources.Anonymous_Types_colon}
    'a {FeaturesResources.is_} new {{ string Name, 'b Address }}
    'b {FeaturesResources.is_} new {{ string Street, string Zip }}"));

            // verify second property
            await TestInMethodAsync(
@"var x = new[] { new { Name = ""BillG"", Address = new { Street = ""1 Microsoft Way"", Zip = ""98052"" } } };

x[0].$$Name",
                MainDescription(@"string 'a.Name { get; }"),
                NoTypeParameterMap,
                AnonymousTypes(
$@"
{FeaturesResources.Anonymous_Types_colon}
    'a {FeaturesResources.is_} new {{ string Name, 'b Address }}
    'b {FeaturesResources.is_} new {{ string Street, string Zip }}"));
        }