SearchableAttribute creating duplicate instances of attributes on nested types

[Priscillalala]

SearchableAttribute first searches every type in the assembly for the attribute, this includes nested types. Then, it searches the members of each type, which includes nested types. As a result, a SearchableAttribute applied to a nested type will be included in the instancesList twice.

For example, in this case:

    public class TestAttribute : HG.Reflection.SearchableAttribute { }

    public class Outer
    {
        [TestAttribute]
        public class Inner { }
    }

A call to SearchableAttribute.GetInstances() should return a list with 1 element, but the list instead contains 2 TestAttributes that target Inner.

As far as I know this affects nothing in vanilla, but can cause unintended behaviour for modders.