Return a type predicate function that returns true if the type of x is Required<ObjectOf<T>>.

To enhance performance, users are advised to cache the return value of this function and mitigate the creation cost.

import { is } from "@core/unknownutil";

const isMyType = is.RequiredOf(is.ObjectOf({
  a: is.Number,
  b: is.UnionOf([is.String, is.Undefined]),
  c: is.OptionalOf(is.Boolean),
}));
const a: unknown = { a: 0, b: "b", c: true, other: "other" };
if (isMyType(a)) {
  // 'a' is narrowed to { a: number; b: string | undefined; c: boolean }
  const _: { a: number; b: string | undefined; c: boolean } = a;
}