code: function(command) {
  			this._commandList[command.id] = command;
  			// Resolve any pending key/url bindings against this command
  			var pending = this._pendingBindings[command.id];
  			if (pending) {
  				var _self = this;
  				pending.forEach(function(binding) {
  					_self._addBinding(command, binding.type, binding.binding, binding.bindingOnly);
  				});
  				delete this._pendingBindings[command.id];
  			}
  		}
docs: Add a command to the command registry.  Nothing will be shown in the UI
  until this command is referenced in a contribution.
  @param {orion.commands.Command} command The command being added.
  @see registerCommandContribution