Has to be better way of gathering all names of a certain defined resources in Puppet

info.pp

class info {
  define iota() {}

  Info::Iota<| |>

  $info_template = '<% scope.compiler.catalog.vertices.each do |resource| -%>
<%- if resource.type == "Info::Iota" -%><%= resource.name %>,<% end -%>
<%- end -%>'

  $all_iotas = unique(sort(split(chop(inline_template($info_template)),',')))
}

site.pp

node 'a' {
  @info::iota{ 'foo': }
  include info
  notice(join($info::all_iotas,','))
}

node 'b' inherits 'a' {
  @info::iota{ 'bar': }
}