def generate_output(inputs, output)
      parser = Less::Parser.new options
      inputs.each do |input|
        output.write parser.parse(input.read).to_css
      end
    end
def generate_output(inputs, output)
      parser = Less::Parser.new options
      inputs.each do |input|
        output.write parser.parse(input.read).to_css
      end
    end
@param [Proc] block a block to use as the Filter's
   {#output_name_generator}.
 Implement the {#generate_output} method required by
 the {Filter} API. Attempts to compile each input file
 with LessJs.

 @param [Array<FileWrapper>] inputs an Array of
   {FileWrapper} objects representing the inputs to
   this filter.
 @param [FileWrapper] output a single {FileWrapper}
   object representing the output.