# File lib/active_ldap/attributes.rb, line 23
      def blank_value?(value)
        case value
        when Hash
          value.values.all? {|val| blank_value?(val)}
        when Array
          value.all? {|val| blank_value?(val)}
        when String
          /\A\s*\z/ =~ value
        when nil
          true
        else
          value.blank?
        end
      end