import { option } from "https://deno.land/x/typeguardkit@0.32.1/mod.ts";
option can be used to create an OptionAsserter without specifying a
typeName.
Example:
import { _string, option } from "typeguardkit";
export const _OptionalString = option(_string);
Type Parameters
DefinedTypeAsserter extends Asserter<unknown>
Parameters
definedTypeAsserter: DefinedTypeAsserter