/**
 * Column `options` serialization for the declarative `<GridColumn>` API.
 *
 * Mirrored verbatim in `@toolbox-web/grid-vue`. This deliberately does NOT live
 * in `@toolbox-web/grid`: core's `index.js` sits at ~48.4 kB gzipped against a
 * 50 kB hard budget, and no core consumer calls a serializer — only the
 * declarative adapter column components do. See the DECIDED entry in
 * `.github/knowledge/adapters.md`.
 *
 * The format authority is core's `parseLightDomColumns`
 * (`core/internal/columns.ts`), which reads the `options` attribute as CSV
 * (`"admin:Admin,user"`). Keep this function in lockstep with that parser; the
 * round-trip test in `column-options.spec.ts` pins the contract.
 */
/**
 * Select/typeahead options accepted by `<GridColumn options={...} />`.
 *
 * Either bare values (label defaults to the value) or `{ label, value }`
 * pairs. Values and labels are serialized into an attribute, so they must not
 * contain `,` or `:`.
 * @since 2.5.0
 */
export type ColumnOptions = Array<string | number> | Array<{
    label: string;
    value: string | number;
}>;
/**
 * Flatten {@link ColumnOptions} into the `options` attribute CSV understood by
 * the core column parser. Returns `undefined` for an empty list so the
 * attribute is omitted entirely.
 */
export declare function serializeColumnOptions(options: ColumnOptions): string | undefined;
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