I mooving method to Controller from View this not working/

Hello.

Code:

'toolbar button[action=remove]': {
                click: this.remove
            },


remove: function (sm, selection) {       
                var selection = this.getView().getSelectionModel().getSelection()[0];  // here i get exeption                              
                            if (selection.length > 1) {                                                                           
                                    store.remove(selection);
                                    store.sync();                                                                                                           
                            }
                            else {                                              
                                    store.remove(selection);
                                    store.sync();                                       
                }
      }

This exeption i get: 0x800a138f - JavaScript runtime error: Unable to get property 'indexOf' of undefined or null reference.

this.getView() - I think i need chenge view to another this.view but how i do this?

Thanks.

I mooving method to Controller from View this not working/