import type { AssignFormPropertiesOptions, PartialRecordWithNull } from './types';
/**
 * Hydrate form state from a data source (e.g. a loaded entity):
 * assign `data`'s values onto `form`. 'null' values are transformed to an
 * empty string so they bind cleanly to form inputs.
 *
 * Only keys already declared in `form` are assigned — the form state owns
 * its shape. Copying every data key would leak unrelated entity properties
 * (id, timestamps, sibling sub-form fields, ...) into the form state and
 * from there into submit payloads, where a stale copy from one sub-form
 * can clobber an edited value from another.
 *
 * When `options.fields` is provided (the validup `fields` accessor bound
 * to `form`), hydration preserves unsaved user edits — see
 * {@link AssignFormPropertiesOptions}.
 *
 * @param form the form state to hydrate (mutated in place)
 * @param data the data source to read values from
 * @param options optional edit-preserving behavior
 */
export declare function assignFormProperties<T extends Record<string, any>>(form: T, data?: PartialRecordWithNull<T>, options?: AssignFormPropertiesOptions): T;
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