export declare const isFunction: (data: unknown) => data is (...args: unknown[]) => Promise<unknown>;
export declare const isIpPort: (value: unknown) => value is number;
export declare const isObject: (value: unknown) => value is Record<PropertyKey, unknown>;
export declare const hasProp: <P extends PropertyKey, V = unknown>(value: unknown, prop: P) => value is Record<P, V>;
export declare const hasNumberProp: <P extends PropertyKey>(value: unknown, prop: P) => value is Record<P, number>;
export declare const hasStringProp: <P extends PropertyKey>(value: unknown, prop: P) => value is Record<P, string>;