code: function parse(buffer, headers) {
      var params = getParsingParams(headers);
      var strategy = PARSING_STRATEGIES[params.contentType] ||
              function (/*buffer, headers*/) { return null; };
  
      try {
          return strategy(buffer, params.charset);
      } catch (err) {
          // Might be nice to do some logging here.
          return null;
      }
  }
docs: @method parse
  Parses the a buffer into the expected internal type, based
  on standard request headers (content-type and charset).
  
  @param  {buffer} buff The initial buffer value to parse.
  @param  {object} headers Used to select the conversion strategy.
  @return {object} Parsed post-body according to content-type and charset.