throw new Error(`You appear to be using an async cache handler, ` + `which your current version of Babel does not support. ` + `We may add support for this in the future, ` + `but if you're on the most recent version of @babel/core and still ` + `seeing this error, then you'll need to synchronously handle your caching logic.`);
}
if (value != null && typeof value !== "string" && typeof value !== "boolean" && typeof value !== "number") {
throw new Error("Cache keys must be either string, boolean, number, null, or undefined.");