/*
* call-seq:
* include?(node)
*
* Returns true if any member of node set equals +node+.
*/
static VALUE include_eh(VALUE self, VALUE rb_node)
{
xmlNodeSetPtr node_set;
xmlNodePtr node;
if(! rb_funcall(rb_node, rb_intern("is_a?"), 1, cNokogiriXmlNode))
rb_raise(rb_eArgError, "node must be a Nokogiri::XML::Node");
Data_Get_Struct(self, xmlNodeSet, node_set);
Data_Get_Struct(rb_node, xmlNode, node);
return (xmlXPathNodeSetContains(node_set, node) ? Qtrue : Qfalse);
}