object
method add :
string ->
(< clone : 'a; node : 'a Pxp_document.node;
set_node : 'a Pxp_document.node -> unit; .. >
as 'a)
Pxp_document.node -> unit
method find : string -> 'a Pxp_document.node
method index : (string, 'a Pxp_document.node) Hashtbl.t
end