def passthrough(identifier, params={})
raise ArgumentError.new("#passthrough does not require a block") if block_given?
rep_name = params[:rep] || :default
compilation_block = proc { }
compilation_rule = Rule.new(identifier_to_regex(identifier), rep_name, compilation_block)
@rules_collection.add_item_compilation_rule(compilation_rule)
routing_block = proc do
item[:extension].nil? ? item.identifier.chop : item.identifier.chop + '.' + item[:extension]
end
routing_rule = Rule.new(identifier_to_regex(identifier), rep_name, routing_block, :snapshot_name => :last)
@rules_collection.add_item_routing_rule(routing_rule)
end