code: function(outputs, identifier) {
          var output;
          if (identifier) {
              for (var i=outputs.length-1; i>=0; --i) {
                  if (outputs[i].identifier === identifier) {
                      output = i;
                      break;
                  }
              }
          } else {
              output = 0;
          }
          return output;
      }
docs: Method: getOutputIndex
  Gets the index of a processOutput by its identifier
  
  Parameters:
  outputs - {Array} The processOutputs array to look at
  identifier - {String} The identifier of the output
  
  Returns
  {Integer} The index of the processOutput with the provided identifier
  in the outputs array.