setSelection
Sets custom dates selection programmatically.
CalendarSelection needs to meet to validity criteria, otherwise this method will have no effect.
Validity criteria: – selection is within the CalendarParams.range – selection boundaries are not disabled dates – selection type corresponds to CalendarParams.selectionMode
If selection is CalendarSelection.Range:
range has start date set – start date is lower than end date (if end date is present)
Please note the changes won't apply immediately – the new state will be calculated in background thread.