You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: resource_type_impl.rb
    path of file: ./repos/puppet/lib/puppet/pops/resource
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require_relative 'param'

module Puppet::Pops
module Resource
def self.register_ptypes(loader, ir)
  types = [Param, ResourceTypeImpl].map do |c|
    c.register_ptype(loader, ir)
  end
  types.each { |t
    
  def <=>(other)
    # Order is only maintained against other types, not arbitrary objects.
    # The natural order is based on the reference name used when comparing
    return nil unless other.is_a?(Puppet::CompilableResourceType)

    # against other type instances.
    ref <=> other.ref
  end