import { Queryable } from "./Queryable";
import { FunctionExpression } from "../ExpressionBuilder/Expression/FunctionExpression";
import { IQueryExpression } from "./QueryExpression/IQueryExpression";
import { IQueryVisitor } from "../Query/IQueryVisitor";
import { GroupedEnumerable } from "../Enumerable/GroupedEnumerable";
export declare class GroupByQueryable<K, T> extends Queryable<GroupedEnumerable<K, T>> {
    readonly parent: Queryable<T>;
    protected readonly keySelectorFn: (item: T) => K;
    private _keySelector;
    protected keySelector: FunctionExpression<any>;
    constructor(parent: Queryable<T>, keySelector: FunctionExpression<K> | ((item: T) => K));
    buildQuery(queryVisitor: IQueryVisitor): IQueryExpression<GroupedEnumerable<K, T>>;
    hashCode(): number;
}