code: function (parametersList, parameters, section) {
              if (parameters[section]) {
                  for (var name in parameters[section]) {
                      var addCondition = parameters[section][name];
                      if (parametersList[section] && parametersList[section][name]) {
  
                          // Merge parameters attributes
                          for (var attr in addCondition) {
                              if (_.has(parametersList, [section, name, attr]) === false) {
                                  // Attribute does not exists -> add to list
                                  parametersList[section][name][attr] = addCondition[attr];
                              } else {
                                  // Attribute already exists compare values
                                  if (_.isFunction(addCondition[attr])) {
                                      addCondition[attr] = _functionName(addCondition[attr]);
                                  }
  
                                  if (JSON.stringify(parametersList[section][name][attr]) != JSON.stringify(addCondition[attr])) {
                                      throw new Error("Precondition conflict: " + preconditions[index].name + ' -> ' + preconditions[index].version + ' -> ' + preconditions[index].method + ' -> ' + attr + ':' + addCondition[attr] + ' ->  already defined in previous controller and value is mismatching');
                                  }
                                  else {
                                      parametersList[section][name][attr] = addCondition[attr];
                                  }
                              }
                          }
                      } else {
                          parametersList[section] = parametersList[section] ? parametersList[section] : {};
                          parametersList[section][name] = addCondition;
                      }
  
                      // Filter parameter attributes by allowedAttributes
                      var validatedParameterAttributes = {};
                      if (_.has(parametersList, [section, name])) {
                          for (var attr in parametersList[section][name]) {
                              validatedParameterAttributes[attr] = _removeAttributes(parametersList[section][name][attr], attr);
                          }
                      }
  
                      if (!_.isEmpty(validatedParameterAttributes)) {
                          parametersList[section][name] = validatedParameterAttributes;
                      }
                  }
              }
              return parametersList;
          }
docs: Parse preconditions parameters in section header, query, body