class REXML::XPathParser

def descendant(nodeset, include_self)
  nodesets = []
  nodeset.each do |node|
    new_nodeset = []
    new_nodes = {}
    descendant_recursive(node.raw_node, new_nodeset, new_nodes, include_self)
    nodesets << new_nodeset unless new_nodeset.empty?
  end
  nodesets
end