function asserts.assertimport { asserts } from "https://deno.land/x/fsrouter@3.1.0/deps.ts"; const { assert } = asserts; assert(expr: unknown, msg?): asserts exprMake an assertion, error will be thrown if expr does not have truthy value. Parametersexpr: unknownoptionalmsg = [UNSUPPORTED]Returnsasserts expr