Memory profiling for fun and profit

MapList::only_matching_deallocation_backtraces

fn only_matching_deallocation_backtraces(
    self: MapList,
    backtrace_ids: [Backtrace|AllocationList|MapList|AllocationGroupList|Integer]
) -> MapList

fn only_matching_deallocation_backtraces(
    self: MapList,
    backtrace_ids: Backtrace|AllocationList|MapList|AllocationGroupList|Integer
) -> MapList

Returns a new MapList with only the maps that were unmapped at one of the given backtrace_ids.