/**
 * The two props a slot may not overwrite, and how it merges them.
 *
 * `mergeSlotProps` next door settles the five *attributes* two
 * nested slots both write, and last-write-wins is right for four of
 * them. It is not right for the wiring, because neither of these is
 * a value:
 *
 *  - **`ref`** is a subscription. `Menu` and `Tooltip` on one trigger
 *    both hand it a floating-ui `refs.setReference` — the anchor each
 *    of them positions its panel against — and the inner one used to
 *    replace the outer one's. Nothing threw. The outer panel simply
 *    had no reference element, so floating-ui left it at
 *    `left: 0; top: 0` in the corner of the viewport, which reads as
 *    a CSS bug and is not one.
 *  - **`on*`** is a listener, and listeners are plural.
 *
 * ### Shared with `@charcuterie/logic`
 *
 * `useClonedChild`'s `mergeClonedProps` applies the identical rule
 * one level down — between a slot and the element a caller wrote —
 * so the `ref`/`on*` primitives (`mergeRefs`, `chainHandlers`, and
 * the two guards) are imported from `@charcuterie/logic` rather than
 * copied here, where they used to be a byte-for-byte duplicate. Only
 * `mergeSlotWiring` stays local: it merges the *other* direction
 * (own over received) and returns just the wiring keys, which is a
 * different function from `mergeClonedProps`.
 */
/**
 * The keys of `ownProps` that must not simply replace the ones
 * `receivedProps` arrived with. Spread **last**, over both.
 */
export declare const mergeSlotWiring: (receivedProps: Record<string, unknown>, ownProps: Record<string, unknown>) => Record<string, unknown>;
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