export type Emoji = string & {
    readonly __brand: 'Emoji';
};
export declare function isNullish(value: unknown): value is null | undefined;
export declare function isBoolean(value: unknown): value is boolean;
export declare function isString(value: unknown): value is string;
export declare function isEmoji(value: unknown): value is Emoji;
export declare function isNumber(value: unknown): value is number;
export declare function isRecord(value: unknown): value is Record<string, unknown>;
export declare function isArray<T>(value: unknown, checkItem: (item: unknown) => item is T): value is T[];
export declare function isPlacement(value: unknown): boolean;