When I try to create an instance of TreeView, the program hangs. I'm using the following code:

openerp.foo = function(instance){

var QWeb = openerp.web.qweb;
    _t = instance.web._t;

    var bar = instance.web.TreeView.include({
        // do something 
    });
};

can put anything inside the curly brackets and it hangs. I can do it for ListView and ViewManager and anything else just fine. It's just TreeView that causes problems.

Here's the error:

web.assets_common.js:2523 error: Some modules could not be started 
Failed modules:          ["web.web_client"] 
Non loaded modules:      ["web.ChangePassword", 
"base.apps", 
"account.reconciliation", 
"im_odoo_support.OdooSupport", 
"__job1", 
"mail.chat_client_action", 
"mail.composer", 
"mail.chat_manager", 
"mail.Chatter", 
"mail.systray", 
"mail.window_manager",
"mail.ExtendedChatWindow", 
"mail_tip.mail_tip", 
"web.planner", 
"web_settings_dashboard"]0:
"web.ChangePassword"1: 
"base.apps"2: 
"account.reconciliation"3: 
"im_odoo_support.OdooSupport"4: 
"__job1"5: 
"mail.chat_client_action"6: 
"mail.composer"7: 
"mail.chat_manager"8: 
"mail.Chatter"9: 
"mail.systray"10: 
"mail.window_manager"11: 
"mail.ExtendedChatWindow"12: 
"mail_tip.mail_tip"13: 
"web.planner"14: 
"web_settings_dashboard"
length: 15__proto__: Array[0]
concat: concat()
constructor: Array()
copyWithin: copyWithin()
entries: entries()
every: every()
fill: fill()
filter: filter()
find: find()
findIndex: findIndex()
forEach: forEach()
includes: includes()
indexOf: indexOf()
join: join()
keys: keys()
lastIndexOf: lastIndexOf()
length: 0
map: map()
pop: pop()
push: push()
reduce: reduce()
reduceRight: reduceRight()
reverse: reverse()
shift: shift()
slice: slice()
some: some()
sort: sort()
splice: splice()
toLocaleString: toLocaleString()
toString: toString()
unshift: unshift()
Symbol(Symbol.iterator): values()
Symbol(Symbol.unscopables): Object
__proto__: Object
log @ web.assets_common.js:2523
(anonymous function) @ web.assets_common.js:2530
(anonymous function) @ web.assets_common.js:650
fire @ web.assets_common.js:644
add @ web.assets_common.js:645
(anonymous function) @ web.assets_common.js:650
each @ web.assets_common.js:473
(anonymous function) @ web.assets_common.js:650
Deferred @ web.assets_common.js:651
then @ web.assets_common.js:650
(anonymous function) @ web.assets_common.js:2530
(anonymous function) @ web.assets_common.js:44