module AWS::IAM::Collection::WithPrefix

def _each_item marker, max_items, options = {}, &block
    
  prefix = options.delete(:prefix) || self.prefix
  options[:path_prefix] = "/#{prefix}".sub(%r{^//}, "/") if prefix
  super(marker, max_items, options, &block)
end

def initialize options = {}
  @prefix = options[:prefix]
  super
end

def with_prefix prefix
  prefix = "/#{prefix}".sub(%r{^//}, "/")
  self.class.new(:prefix => prefix, :config => config)
end