/**
 * What `Select`'s empty row is called — and it depends on which of two jobs that
 * row is doing.
 *
 * A CHOICE (`clearable`) is how the reader gets back to no value. They
 * pick it the way they pick any other row, so it is NAMED, and named the same
 * whether or not something is currently selected — a name that vanishes on
 * selection vanishes exactly when it is needed.
 *
 * A PLACEHOLDER exists only because nothing is chosen yet. It carries the
 * caller's hint and leaves on selection; naming it "None" would turn a prompt
 * into an apparent value.
 *
 * RN-free so the rule is testable as the rule, rather than through a native
 * `<select>` and its untranspiled dependency.
 */
export declare function pickerEmptyOptionLabel(opts: {
    clearable?: boolean;
    /** Per-instance override for the choice's name. */
    emptyLabel?: string;
    /** The caller's hint, used only when the row is a placeholder. */
    placeholder?: string;
    /** The locale pack's word for "no value". */
    localeEmptyOption: string;
}): string;