# File lib/sprockets/processing.rb, line 114
    def register_postprocessor(mime_type, klass, &block)
      expire_index!

      if block_given?
        name  = klass.to_s
        klass = Class.new(Processor) do
          @name      = name
          @processor = block
        end
      end

      @postprocessors[mime_type].push(klass)
    end