# File lib/ya2yaml.rb, line 24
  def _ya2yaml(obj)
    raise 'set $KCODE to "UTF8".' if (RUBY_VERSION < '1.9.0') && ($KCODE != 'UTF8')
    '--- ' + emit(obj, 1) + "\n"
  rescue SystemStackError
    raise ArgumentError, "ya2yaml can't handle circular references"
  end