export declare function _dummyEchoPrefix(prefix: string): string;
export declare function _dummyEchoTextCore(pre: string, text: string): string;
export declare function _dummyEchoText(prefix: string, text: string): string;
export declare function isDummyEchoMaybe(value: string): boolean;
export declare function isDummyEchoMaybeOrEmpty(value: string): boolean;