import type { WidgetInstanceProps } from '../library/component-props';
/**
 * The one key copied from `RuleCMSWidget.placeholderValues` onto a card.
 * Must stay the key `r-text` reads. The renderer copies the value and does
 * not look inside it.
 */
export declare const WIDGET_PLACEHOLDER_VALUES_KEY = "placeholderValues";
/**
 * When the host passed `placeholderValues` on the widget, every instance
 * receives that object unless its own `componentProps` entry already has the
 * key. An entry that sets the key wins even when the value is `null`.
 * `undefined` means the widget argument was omitted.
 */
export declare function withWidgetPlaceholderValues({ widgetInstanceProps, placeholderValues, }: {
    widgetInstanceProps?: WidgetInstanceProps;
    placeholderValues?: unknown;
}): WidgetInstanceProps | undefined;
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