# File lib/openid/server.rb, line 659
      def get_association(assoc_handle, dumb)
        if assoc_handle.nil?
          raise ArgumentError, 'assoc_handle must not be nil'
        end
        
        key = dumb ? @@dumb_key : @@normal_key
        
        assoc = @store.get_association(key, assoc_handle)
        if assoc and assoc.expired?
          @store.remove_association(key, assoc_handle)
          assoc = nil
        end
        
        return assoc
      end