state_index_for_unwind

# File lib/rubygems/resolver/molinillo/lib/molinillo/resolution.rb, line 194
      def state_index_for_unwind
        current_requirement = requirement
        existing_requirement = requirement_for_existing_name(name)
        index = -1
        [current_requirement, existing_requirement].each do |r|
          until r.nil?
            current_state = find_state_for(r)
            if state_any?(current_state)
              current_index = states.index(current_state)
              index = current_index if current_index > index
              break
            end
            r = parent_of(r)
          end
        end

        index
      end