# File lib/ruote/exp/ro_on_x.rb, line 37
    def deflate(err)

      {
        'fei' => h.fei,
        'at' => Ruote.now_to_utc_s,
        'class' => err.class.to_s,
        'message' => err.message,
        'trace' => err.backtrace,
        'details' => err.respond_to?(:ruote_details) ? err.ruote_details : nil,
        'deviations' => err.respond_to?(:deviations) ? err.deviations : nil,
        'tree' => tree
      }
    end