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: p_runtime_type.rb
    path of file: ./repos/puppet/lib/puppet/pops/types
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Puppet::Pops
module Types
# @api public
class PRuntimeType < PAnyType
  TYPE_NAME_OR_PATTERN = PVariantType.new([PStringType::NON_EMPTY, PTupleType.new([PRegexpType::DEFAULT, PStringType::NON_EMPTY])])

  def self.register_ptype(loader, ir)
    create_ptype(loader, ir, 'AnyType',
                 'runtime' => {
                   KEY_TYPE => POptionalType.new(PStringType::NON_EMPTY),
                   KEY_VALUE => nil
                 
    
  def _assignable?(o, guard)
    return false unless o.is_a?(PRuntimeType)
    return false unless @runtime.nil? || @runtime == o.runtime
    return true if @name_or_pattern.nil? # t1 is wider

    onp = o.name_or_pattern
    return true if @name_or_pattern == onp
    return false unless @name_or_pattern.is_a?(String) && onp.is_a?(String)

    # NOTE: This only supports Ruby, must change when/if the set of runtimes is expanded
    begin
      c1 = ClassLoader.provide(self)
      c2 = ClassLoader.provide(o)
      c1.is_a?(Module) && c2.is_a?(Module) && !!(c2 <= c1)
    rescue ArgumentError
      false
    end