/**
 * A button type supported by the built-in UI components (`dialog`, `emptyDataState`,
 * `notification`). Each type maps to the `ht-button--<type>` modifier class.
 */
export type ButtonType = 'primary' | 'secondary';
/**
 * Checks whether the passed value is one of the supported button types.
 *
 * Both the settings validators and the render sites go through this, so a value the validator
 * accepts is exactly a value the markup can carry.
 */
export declare function isButtonType(type: unknown): type is ButtonType;
/**
 * Resolves a caller-supplied button type to one of the supported values, falling back to
 * `secondary` for anything else.
 *
 * The UI components build their `ht-button--<type>` class from this value, so resolving it at the
 * render site keeps an unexpected value from breaking out of the class name (and, once that markup
 * is built with DOM APIs instead, from throwing `InvalidCharacterError` in `classList.add()`).
 */
export declare function resolveButtonType(type: unknown): ButtonType;