/**
 * Prepare css rule to hide specific blocks
 *
 * Should be called only once during the visual test.
 * @note this function is evaluated in the context of the page and should not use external variables
 * @param ignoreClass
 */
export declare function prepareVisualTesting(ignoreClass?: string): void;
/**
 * Determine if the visual testing is enabled
 */
export declare function isVisualTestingEnabled(): boolean;
/**
 * Toggle the visual testing view : if it is active, will hide tagged components as grey blocks.
 * @note this function is evaluated in the context of the page and cannot use external code
 * @param enabled
 */
export declare function toggleVisualTestingRender(enabled: boolean): void;
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