code: function (parameters, name) {
                  var
                      len,
                      idx,
                      parameter;
                  len = parameters.length;
                  for (idx = 0; idx < len; ++idx) {
                      parameter = parameters[idx];
                      if (parameter._name === name) {
                          return parameter;
                      }
                  }
                  return null;
              }
docs: Helper used to manipulate the list of parameters: retrieve one
  using name.
  
  @param {gpf.Parameter[]} parameters
  @param {String} name