this is odoo 10 code but it neither work in odoo11 nor there is any error I have already tried web.Widget solution mentioned in this link https://www.odoo.com/forum/help-1/question/odoo-11-how-to-define-a-form-view-custom-widget-in-odoo-11-127105  if anyone can help it would be great

odoo.define('web_one2many_selectable_10.form_widgets', function (require) {
   "use strict";

   var core = require('web.core');
   var form_common = require('web.form_common');
   var _t = core._t;
   var QWeb = core.qweb;
   var Model = require('web.Model');
   var FieldOne2Many = core.form_widget_registry.get('one2many');


   var One2ManySelectable = FieldOne2Many.extend({
      // my custom template for unique char field
      template: 'One2ManySelectable', 

      multi_selection: true,
      //button click
      events: {
         "click .cf_button_confirm": "action_selected_lines",
      },
      start: function() 
       {
          this._super.apply(this, arguments);
         var self=this;       
         },
      //passing ids to function
      action_selected_lines: function()
      {     
         var self=this;
         var selected_ids = self.get_selected_ids_one2many();
         if (selected_ids.length === 0)
         {
            this.do_warn(_t("You must choose at least one record."));
            return false;
         }
         var model_obj=new Model(this.dataset.model); 
         //you can hardcode model name as: new Model("module.model_name");
         //you can change the function name below
         /* you can use the python function to get the IDS
               @api.multi
            def bulk_verify(self):
                    for record in self:
                        print record
         */
         model_obj.call('bulk_verify',[selected_ids],{context:self.dataset.context})
         .then(function(result){
         });
      },
      //collecting the selected IDS from one2manay list
      get_selected_ids_one2many: function ()
      {
         var ids =[];
         this.$el.find('td.o_list_record_selector input:checked')
               .closest('tr').each(function () {
                  
                  ids.push(parseInt($(this).context.dataset.id));
                  console.log(ids);
         });
         return ids;
      },


   });
   // register unique widget, because Odoo does not know anything about it
   //you can use <field name="One2many_ids" widget="x2many_selectable"> for call this widget
   core.form_widget_registry.add('one2many_selectable', One2ManySelectable);
});