Puppet::Parser::Functions.newfunction(:hiera_resources, :type => :statement) do |args|
  raise Puppet::Error, "hiera_resources requires 1 argument; got #{args.length}" if args.length != 1
  apps = function_hiera_hash(args[0], {})
  apps.each do |res_type, resources|
    function_create_resources(res_type, resources)
  end
end