Gem::SafeMarshal::Visitors::ToRuby#resolve_class

# File tmp/rubies/ruby-3.3.0/lib/rubygems/safe_marshal/visitors/to_ruby.rb, line 274
def resolve_class(n)
  @class_cache[n] ||= begin
    to_s = resolve_symbol_name(n)
    raise UnpermittedClassError.new(name: to_s, stack: formatted_stack) unless @permitted_classes.include?(to_s)
    visit_symbol_type(n)
    begin
      ::Object.const_get(to_s)
    rescue NameError
      raise ArgumentError, "Undefined class #{to_s.inspect}"
    end
  end
end