# File lib/plucky/normalizers/sort_value.rb, line 32
      def normalized_sort_piece(value)
        case value
          when SymbolOperator
            [normalized_direction(value.field, value.operator)]
          when String
            value.split(',').map do |piece|
              normalized_direction(*piece.split(' '))
            end
          when Symbol
            [normalized_direction(value)]
          else
            value
        end
      end