# File lib/oauth/request_proxy/em_http_request.rb, line 52
    def merged_parameters(params, *extra_params)
      extra_params.compact.each do |params_pairs|
        params_pairs.each_pair do |key, value|
          if params.has_key?(key)
            params[key] += value
          else
            params[key] = [value].flatten
          end
        end
      end
      params
    end