Angular 1.3 (unstable version) added a new syntax feature for binding in partial file:

{{::foo}}

The difference between current {{foo}} (which still works of course) is that {{::foo}} is replaced only once and after rendering, if variable foo is changed, this change is not reflected in page anymore. This is great for performance and memory usage.

Would be great if editor in IDE would support both {{foo}} and {{::foo}} for code completion after the 2 double colons:
{{::| }}

and go to declaration.

Thanks