import { Expression } from '../../core/expression';
import { PipeOperator } from '../../core/pipe-operator';
import { ObjectValueSelector, ObjectValueSelectorType } from '../../helpers/object-value-selector';
export declare class ApplyOperator implements PipeOperator {
    private readonly f;
    constructor(f: (input: Expression<any>) => Expression);
    instantiate(input: Expression<unknown>): Expression<any>;
}
export declare function apply<TIn, TSelector extends ObjectValueSelector<TIn>>(selector: TSelector): PipeOperator<TIn, ObjectValueSelectorType<TIn, TSelector>>;