def add_sibling_machine_configs
      # Add existing states
      sibling_machines.each do |machine|
        machine.states.each { |state| states << state unless states[state.name] }
      end
    end
def add_sibling_machine_configs
      # Add existing states
      sibling_machines.each do |machine|
        machine.states.each { |state| states << state unless states[state.name] }
      end
    end
Updates this machine based on the configuration of other machines in the
 owner class that share the same target attribute.