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: debug.rb
    path of file: ./repos/mocktail/lib/mocktail/sorbet/mocktail
    
    the code of the file until where you have to start completion: # typed: strict

module Mocktail
  module Debug
    extend T::Sig

    # It would be easy and bad for the mocktail lib to call something like
    #
    #   double == other_double
    #
    # But if it's a double, that means anyone who stubs that method could change
    # the internal behavior of the library in unexpected ways (as happened here:
    # https://github.com/testdouble/mocktail/issues/7 )
    #
    # For that reason when we run our tests, we also want to blow up if this
    # happens unintentionally. This works in conjunction with the test
    # MockingMethodfulClassesTest, because it mocks every defined meth
    
    def self.guard_against_mocktail_accidentally_calling_mocks_if_debugging!
      return unless ENV["MOCKTAIL_DEBUG_ACCIDENTAL_INTERNAL_MOCK_CALLS"]
      raise Mocktail::Error
    rescue Mocktail::Error => e
      base_path = Pathname.new(__FILE__).dirname.to_s
      backtrace_minus_this_and_whoever_called_this = e.backtrace&.[](2..)
      internal_call_sites = backtrace_minus_this_and_whoever_called_this&.take_while { |call_site|
        # the "in `block" is very confusing but necessary to include lines after
        # a stubs { blah.foo }.with { â€¦ } call, since that's when most of the
        # good stuff happens
        call_site.start_with?(base_path) || call_site.include?("in `block")
      }&.reject { |call_site| call_site.include?("in `block") } || []

      approved_call_sites = [
        /fulfills_stubbing.rb:(16|20)/,
        /validates_arguments.rb:(18|23)/,
        /validates_arguments.rb:(21|26)/
      ]
      if internal_call_sites.any? && approved_call_sites.none? { |approved_call_site|
        internal_call_sites.first&.match?(approved_call_site)
      }
        raise Error.new <<~MSG
          Unauthorized internal call of a mock internally by Mocktail itself:

          #{internal_call_sites.first}

          Offending call's complete stack trace:

          #{backtrace_minus_this_and_whoever_called_this&.join("\n")}
          ==END OFFENDING TRACE==
        MSG
      end