text: import * as zrUtil from 'zrender/src/core/util';
  import * as modelUtil from '../../util/model';
  
  export default function (option) {
      createParallelIfNeeded(option);
      mergeAxisOptionFromParallel(option);
  }
  
  /**
   * Create a parallel coordinate if not exists.
   * @inner
   */
  function createParallelIfNeeded(option) {
      if (option.parallel) {
          return;
      }
  
      var hasParallelSeries = false;
  
      zrUtil.each(option.series, function (seriesOpt) {
          if (seriesOpt && seriesOpt.type === 'parallel') {
              hasParallelSeries = true;
          }
      });
  
      if (hasParallelSeries) {
          option.parallel = [{}];
      }
  }
  
  /**
   * Merge aixs definition from parallel option (if exists) to axis option.
   * @inner
   */
  function mergeAxisOptionFromParallel(option) {
      var axes = modelUtil.normalizeToArray(option.parallelAxis);
  
      zrUtil.each(axes, function (axisOption) {
          if (!zrUtil.isObject(axisOption)) {
              return;
          }
  
          var parallelIndex = axisOption.parallelIndex || 0;
          var parallelOption = modelUtil.normalizeToArray(option.parallel)[parallelIndex];
  
          if (parallelOption && parallelOption.parallelAxisDefault) {
              zrUtil.merge(axisOption, parallelOption.parallelAxisDefault, false);
          }
      });
  }
  