export declare function getInvalidPopoverError(): Error;
export declare function getUnanchoredPopoverError(): Error;
export declare function getInvalidHorizontalAlignError(alignment: any): Error;
export declare function getInvalidVerticalAlignError(alignment: any): Error;
export declare function getInvalidTriggerError(trigger: any): Error;
export declare function getInvalidScrollStrategyError(strategy: any): Error;