code: function _registerAll() {
    if (!registerAllCalled) {
      registerAllCalled = true;
      Object.keys(ComponentsHash)
        .filter(tagName => typeof ComponentsHash[tagName] !== 'function')
        .forEach(tagName => _registerComponent(tagName));
    }
  }
docs: Registers all defined components with the browser as WebComponents.
  
  This is called by `Layer.init()` and should not be called directly.
  
  @private
  @method _registerAll