import type { SlotComponentProps } from '@mui/utils/types';
type AnySlotProps = Record<string, any>;
/**
 * Merge a Material wrapper's default slot props (`base`, e.g. the resolved
 * `className`/`sx`) with a consumer-supplied slot prop, preserving the
 * `(ownerState) => props` **callback form** of `SlotComponentProps`.
 *
 * The Material chat components pre-compute their default slot props as a plain
 * object before handing them to the headless slot. Spreading the consumer slot
 * prop with `...(slotProps?.x as object)` silently flattens a callback to `{}`,
 * dropping owner-state-driven `className`/`sx`/handlers. A plain spread also
 * lets the consumer overwrite wrapper classes, top-level `sx`, refs, and
 * internal handlers. This helper keeps the callback form and merges React props
 * with the same rules used by slot utilities: class names concatenate, `sx`
 * layers are appended, styles merge, refs compose, handlers chain, and ordinary
 * props still let the consumer win.
 *
 * @param base Default props the wrapper always applies (e.g. `className`, `sx`).
 * @param consumer The consumer slot prop (object form, callback form, or undefined).
 */
export declare function mergeSlotProps<OwnerState>(base: AnySlotProps, consumer: SlotComponentProps<any, Record<string, unknown>, OwnerState> | undefined): AnySlotProps | ((ownerState: OwnerState) => AnySlotProps);
export declare function resolveSlotProps<OwnerState>(slotProps: AnySlotProps | ((ownerState: OwnerState) => AnySlotProps), ownerState: OwnerState): AnySlotProps;
export {};