export declare function assign(obj: any, keyPath: any[], value: any): void;
export declare function groupObjectCountsByThreeProps(objects: any[], primaryProp: string, secondaryProp: string, tertiaryProp: string): any;
export declare function groupObjectCountsByTwoProps(objects: any[], primaryProp: string, getSecondaryProp: (obj: any) => string): any;
export declare function groupObjectCountsByProp(objects: any[], getProp: (obj: any) => string): any;
