NepaliDateRangeFieldViewController
Hosts the pair of typed entry fields for a date range.
options.outlined picks NepaliDateRangeTextField when true and the filled NepaliDateRangeField when false. The controller owns the field contents, so Swift only observes them through onRangeChange.
Parameters
start date the fields open with, or null for empty.
end date the fields open with, or null for empty.
language, date format and digit script the fields render with.
digit layout the user types into.
first Bikram Sambat year accepted.
last Bikram Sambat year accepted.
policy deciding which dates are valid, or null to accept every date.
appearance and behaviour knobs, or null for the library defaults.
receives the content height in points, so the caller can size its frame.
invoked whenever either field parses to a new value. An end that has not been typed yet arrives as null.