module Sequel::Plugins::XmlSerializer::DatasetMethods

def to_xml(opts={})

the root node that contains the nodes for all of the instances.
as well as the :array_root_name option for specifying the name of
this dataset. Takes all of the options available to Model#to_xml,
Return an XML string containing all model objects specified with 
def to_xml(opts={})
  raise(Sequel::Error, "Dataset#to_xml") unless row_proc
  x = model.xml_builder(opts)
  name_proc = model.xml_serialize_name_proc(opts)
  x.send(name_proc[opts.fetch(:array_root_name, model.send(:pluralize, model.send(:underscore, model.name))).to_s]) do |x1|
    all.each do |obj|
      obj.to_xml(opts.merge(:builder=>x1))
    end
  end
  x.to_xml
end