import { PipeTransform } from "@angular/core";
/**
 * Provides a pipe that groups an array based on a field.
 */
export declare class GroupByPipe implements PipeTransform {
    /**
     * The Transform method that implements the Pipe
     * @param value - Array to group
     * @param field - Name of the field based on which the grouping is done.
     */
    transform(value: any[], field: string): any[];
}