code: function Explorer(serviceRegistry, selection, renderer, commandRegistry) {
  		this.registry = serviceRegistry;
  		this.selection = selection;
  		this.commandService = commandRegistry;
  		this.setRenderer(renderer);
  		
  		this.myTree = null;
  	}
docs: Creates a new explorer.
  
  @name orion.explorer.Explorer
  @class A table-based explorer component.
  @param {orion.serviceregistry.ServiceRegistry} serviceRegistry The service registry to
  use for any services required by the explorer
  @param {orion.selection.Selection} selection The initial selection
  @param renderer
  @param {orion.commandregistry.CommandRegistry} commandRegistry The command registry to use for commands.  Optional.