What is the feature?
Lets assume we have 3 collections A, B and C where A is related to B and B is related to C with hasMany relationships. Can we filter records of A with columns present in collection C ?
Note :- Currently using filter feature we can search records of A based on B but not C as foreign key of B (primary key of C) is not available in subfield of A.
What problem does this solve for you?
This would make filtering of records from a child collection easier even with non-key fields
Who else would be using this feature?
This feature will be very frequently used by all the customer.