Support for the 'in' syntax to pass multiple values simultaneously

[CraxFelcore]

Is it possible to support the 'in' syntax to filter on multiple values at the same time. The following example shows the desired result: $filter=City in ('Paris', 'Berlin'). This should return to me all records in these cities. I tried to pass these to your backend without success: Unreadable query has been given Syntax error at position 15 in 'City in ('Paris', 'Berlin')'