export interface Obj {
    [key: string]: unknown;
}
export declare function isObj(value: unknown): value is Obj;
export declare function isDef<T>(value: T): value is NonNullable<T>;
export declare function isPresent<T>(value: T): value is NonNullable<T>;
/**
 * @see https://stackoverflow.com/a/175787/3786294
 */
export declare function isNumeric(str: string): boolean;
export declare function messageOf(error: unknown): string;
export declare function omitProperty<T extends Obj, P extends keyof T>(obj: T, propName: P): Omit<T, P>;
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