function assertimport { assert } from "https://deno.land/x/capi@v0.1.1-beta.1/deps/std/testing/asserts.ts"; assert(expr: unknown, msg?): asserts exprMake an assertion, error will be thrown if expr does not have truthy value. Parametersexpr: unknownoptionalmsg = [UNSUPPORTED]Returnsasserts expr