# File lib/core/connection.rb, line 200
    def open
      object_to_data(@offered_capabilities,
                     Cproton.pn_connection_offered_capabilities(@impl))
      object_to_data(@desired_capabilities,
                     Cproton.pn_connection_desired_capabilities(@impl))
      object_to_data(@properties,
                     Cproton.pn_connection_properties(@impl))
      Cproton.pn_connection_open(@impl)
    end