import { type optionalKeyOf } from "https://deno.land/x/arktype@v1.0.10-alpha/utils/generics.ts";
definition: Exclude<keyof o, requiredKeyOf<o>>
x/arktype/utils/generics.ts>optionalKeyOf
import { type optionalKeyOf } from "https://deno.land/x/arktype@v1.0.10-alpha/utils/generics.ts";