Objects, typed: items, value and callback share one type

// apps/docs/examples/ui/combobox-objects.tsx'use client';
import {useState} from 'react';
import {  Combobox,  ComboboxContent,  ComboboxEmpty,  ComboboxInput,  ComboboxItem,  ComboboxList,} from '@workspace/active-ui/components/primitives/combobox';import {  Field,  FieldDescription,  FieldLabel,} from '@workspace/active-ui/components/primitives/field';
interface Airport {  code: string;  label: string;}
const AIRPORTS: readonly Airport[] = [  {code: 'AMS', label: 'Amsterdam Schiphol'},  {code: 'BRU', label: 'Brussels'},  {code: 'CDG', label: 'Paris Charles de Gaulle'},  {code: 'FRA', label: 'Frankfurt'},  {code: 'LIS', label: 'Lisbon'},];
/** * The generic contract with objects: `Combobox<Airport>` ties `items`, the * `value`, the argument of `onValueChange` and the function child of * `ComboboxList` to one type. The text shown and filtered is the `label`; * `isItemEqualToValue` compares by code, so a value from elsewhere (a form, * the server) matches its item. */export default function ComboboxObjectsExample() {  const [airport, setAirport] = useState<Airport | null>(null);  return (    <Field className="w-full max-w-sm">      <FieldLabel htmlFor="combobox-airport">Departure</FieldLabel>      <Combobox<Airport>        items={AIRPORTS}        value={airport}        onValueChange={(next) => setAirport(next)}        isItemEqualToValue={(item, value) => item.code === value.code}      >        <ComboboxInput          id="combobox-airport"          placeholder="Search an airport"          triggerLabel="Show airports"        />        <ComboboxContent>          <ComboboxEmpty>No airport matches.</ComboboxEmpty>          <ComboboxList>            {(item: Airport) => (              <ComboboxItem key={item.code} value={item}>                {item.label} ({item.code})              </ComboboxItem>            )}          </ComboboxList>        </ComboboxContent>      </Combobox>      <FieldDescription>        {airport ? `Chosen: ${airport.code}` : 'Nothing chosen.'}      </FieldDescription>    </Field>  );}