import.com.quest.wcf.core.timerange.* Classes Missing from 5.6.2 (85363)

The following classes appear to be missing since an upgrade to Foglight 5.6.2.

import com.quest.wcf.core.timerange.TimeRange
import com.quest.wcf.core.timerange.impl.CustomTimeRange

If these classes were deprecated with 5.6.2, is there a way to use them or re-enable legacy classes for use?
These classes were used by us in a custom dashboard and the dashboard is broken without them.

In regards to the two functions:

import com.quest.wcf.core.timerange.impl.CustomTimeRange
import com.quest.wcf.core.timerange.TimeRange

These were never public API classes so the dashboard designer should use the public function handlers.

There is public way to create an instance of CustomTimeRange using functionHelper as documented.