Function isInstanceof

lib/internal/util/inspect.js:875–881

(object, proto)

}

function isInstanceof(object, proto) {
  try {
    return object instanceof proto;
  } catch {
    return false;
  }
}

// Special-case for some builtin prototypes in case their `constructor` property has been tampered.
const wellKnownPrototypes = new SafeMap()