Psych::ClassLoader::Restricted#symbolize

# File tmp/rubies/ruby-4.0.0/ext/psych/lib/psych/class_loader.rb, line 84
def symbolize sym
  return super if @symbols.empty?

  if @symbols.include? sym
    super
  else
    raise DisallowedClass.new('load', 'Symbol')
  end
end