code: public String getNodeDistributionRootUrl() {
          String ret = nodeDistributionRootUrl;
          if (nodeDistributionRootUrl == null) {
              ret = Constants.NODE_DIST_ROOT_URL;
          }
  
          return ret;
      }
docs: Gets the root url where the node distribution is downloaded from. Default value is 'http://nodejs.org/dist/' except if the
  {@link #nodeDistributionUrl} parameter is configured. In this case,
  it returns the url specified by this parameter.
  
  @return the root url used to download the node distribution.