Change signature of AbstractPersistentCollection.IdentityRemoveAll() from ICollection to IEnumerable for generics

The following should be done:

Currently signature of the AbstractPersistentCollection.IdentityRemoveAll() method looks like this:

My suggestion is to change ICollection to IEnumerable:

Why:

The method is implemented in the following way, note that there is no need for ICollection here:

and it is called by the classes like PersistentGenericList, Bag, etc. in the following way:

I'm trying to define my custom collection class and as result getting the following error:

Changing the above method to:

and using in the PersistentGenericList as:

solves the problem.

Please Refacotor > Change Signature someone and commit it.