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The Standard Library has been moved to JSR. See the blog post for details.
function assertNotInstanceOf
import { assertNotInstanceOf } from "https://deno.land/std@0.182.0/testing/asserts.ts";

Make an assertion that obj is not an instance of type. If so, then throw.

Parameters

actual: A
unexpectedType: new (...args: any[]) => T
optional
msg: string

Returns

asserts actual is Exclude<A, T>