    # File lib/fog/bluebox/models/compute/server.rb, line 73
            def save
              raise Fog::Errors::Error.new('Resaving an existing object may create a duplicate') if persisted?
              requires :flavor_id, :image_id, :location_id
              options = {}

              unless persisted?  # new record
                raise(ArgumentError, "password or public_key is required for this operation") if !password && !public_key
                options['ssh_public_key'] = public_key if public_key
                options['password'] = password if @password
              end

              if @lb_backends
                options['lb_backends'] = lb_backends
              elsif @lb_services
                options['lb_services'] = lb_services
              elsif @lb_applications
                options['lb_applications'] = lb_applications
              end

              options['username'] = username
              options['hostname'] = hostname if @hostname
              data = service.create_block(flavor_id, image_id, location_id, options)
              merge_attributes(data.body)
              true
            end