?close:(Netchannels.in_obj_channel -> unit) ->
url_of_id:(Pxp_core_types.I.resolver_id -> Neturl.url) ->
base_url_of_id:(Pxp_core_types.I.resolver_id -> Neturl.url) ->
channel_of_url:(Pxp_core_types.I.resolver_id ->
Neturl.url -> Pxp_reader.accepted_id) ->
unit -> Pxp_reader.resolver
