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: record_ref.rb
    path of file: ./repos/netsuite/lib/netsuite/records
    
    the code of the file until where you have to start completion: module NetSuite
  module Records
    class RecordRef
      include Support::Fields
      include Support::Records
      include Namespaces::PlatformCore

      attr_reader   :internal_id, :type
      attr_accessor :external_id

      def initialize(attributes_or_record = {})
        case a
    
      def initialize(attributes_or_record = {})
        case attributes_or_record
        when Hash
          attributes = attributes_or_record
          attributes.delete(:"@xmlns:platform_core")
          @internal_id = attributes.delete(:internal_id) || attributes.delete(:@internal_id)
          @external_id = attributes.delete(:external_id) || attributes.delete(:@external_id)
          @type        = attributes.delete(:type) || attributes.delete(:@type) || attributes.delete(:"@xsi:type")
          @attributes  = attributes
        else
          record = attributes_or_record
          @internal_id = record.internal_id if record.respond_to?(:internal_id)
          @external_id = record.external_id if record.respond_to?(:external_id)
          @type        = NetSuite::Support::Records.netsuite_type(record)
        end