# File lib/Borges/Callback/CallbackStore.rb, line 62
  def value_for_field(field)
    if field.nil? then
      return ''

    elsif field.respond_to?(:first) && field.respond_to?('empty?'.intern) then
      if field.empty? then
        return ''
      else
        return field.first
      end

    else
      return field

    end
  end