def self.write_one(object, writer, singular = nil)
singular ||= 'ip'
writer.write_start(singular)
href = object.href
writer.write_attribute('href', href) unless href.nil?
Writer.write_string(writer, 'address', object.address) unless object.address.nil?
Writer.write_string(writer, 'gateway', object.gateway) unless object.gateway.nil?
Writer.write_string(writer, 'netmask', object.netmask) unless object.netmask.nil?
Writer.write_string(writer, 'version', object.version) unless object.version.nil?
writer.write_end
end