# File lib/fog/ninefold/models/compute/address.rb, line 70
        def save
          raise "Operation not supported" if self.identity
          requires :zoneid

          options = {
            :zoneid => zoneid,
            :networkid => networkid,
            :account => account,
            :domainid => domainid
          }.delete_if {|k,v| v.nil? || v == "" }
          data = service.associate_ip_address(options)
          merge_attributes(data)
          true
        end