private static void VerifyFilterRestrictions(FilterRestrictions filter)
{
Assert.NotNull(filter);
Assert.NotNull(filter.Filterable);
Assert.False(filter.Filterable.Value);
Assert.NotNull(filter.RequiresFilter);
Assert.False(filter.RequiresFilter.Value);
Assert.NotNull(filter.RequiredProperties);
Assert.Single(filter.RequiredProperties);
Assert.Equal("Id", filter.RequiredProperties.First());
Assert.NotNull(filter.NonFilterableProperties);
Assert.Single(filter.NonFilterableProperties);
Assert.Equal("Emails", filter.NonFilterableProperties.First());
Assert.True(filter.IsRequiredProperty("Id"));
Assert.False(filter.IsRequiredProperty("ID"));
Assert.True(filter.IsNonFilterableProperty("Emails"));
Assert.False(filter.IsNonFilterableProperty("ID"));
}