attempt_to_activate_existing_spec

# File lib/rubygems/resolver/molinillo/lib/molinillo/resolution.rb, line 326
      def attempt_to_activate_existing_spec(existing_node)
        existing_spec = existing_node.payload
        if requirement_satisfied_by?(requirement, activated, existing_spec)
          new_requirements = requirements.dup
          push_state_for_requirements(new_requirements, false)
        else
          return if attempt_to_swap_possibility
          create_conflict
          debug(depth) { "Unsatisfied by existing spec (#{existing_node.payload})" }
          unwind_for_conflict
        end
      end