export declare function isNil(value: any): value is null;
export declare function isNull(value: any): value is null;
export declare function isUndefined(value: any): value is undefined;
export declare function getObjectWithoutEmptyPropsFrom(object: object): object;
export declare function getObjectWithoutUndefinedPropsFrom(object: object): object;
export declare function upsertObjectToArray(arr: any[], prop: object, newVal: any): void;
export declare function getObjectFromArrayByProp(arr: any[], prop: string): any;
export declare function getArrayOfObjectsWithoutProp(arr: any[], propName: string): any[];