function isDateBeforeTypeimport { isDateBeforeType } from "https://deno.land/x/netzo@0.3.66/deps/react-day-picker.ts"; isDateBeforeType(value: unknown): value is DateBeforeReturns true if value is of type DateBefore. Returns true if value is of type DateBefore. Parametersvalue: unknownReturnsvalue is DateBefore