code: function (position, config) {
  
              if (!position) {
                  throw new ArgumentError(
                      Logger.logMessage(Logger.LEVEL_SEVERE, "ColladaLoader", "constructor", "missingPosition"));
              }
  
              this.position = position;
  
              this.dirPath = '/';
  
              this.init(config);
          }
docs: Constructs a ColladaLoader
  @alias ColladaLoader
  @constructor
  @classdesc Represents a Collada Loader. Fetches and parses a collada document and returns the
  necessary information to render the collada model.
  @param {Position} position The model's geographic position.
  @param {Object} config Configuration options for the loader.
  <ul>
  <li>dirPath - the path to the directory where the collada file is located</li>
  </ul>