Filters the attributes that a component exposes through a System.ComponentModel.TypeDescriptor.
true if the set of filtered attributes is to be cached; false if the filter service must query again.
This method is called when a user requests a set of attributes for a component. The attributes are added to the dictionary with the attribute's Attribute.TypeId as the keys and the actual attribute as the value. Implementers of this service can add, remove, or alter existing attribute entries in the dictionary.