Function requiresOf

javascript/selenium-webdriver/project_bidi_schema.mjs:311–316

(ref)

  // discriminator path does) and require the fields required in every leaf, so an
  // alias-to-record variant is not left with an empty (always-matching) predicate.
  const requiresOf = (ref) => {
    const leaves = unionLeaves(ref, types).map(
      (l) => new Set(types[l].fields.filter((f) => f.required).map((f) => f.name)),
    )
    return leaves.length ? [...leaves[0]].filter((k) => leaves.every((s) => s.has(k))) : []
  }
  return { ordered: variants.map((ref) => ({ ref, requires: requiresOf(ref) })) }
}