import { AbstractControl } from '@angular/forms';
import { Observable } from 'rxjs';
import { MethodNames, TypeOfClassMethod } from '../typings';
export type AbstractControlMethods = 'markAsTouched' | 'markAsUntouched' | 'markAsDirty' | 'markAsPristine';
export type EmitValue = boolean;
export type Methods = Partial<Record<AbstractControlMethods, EmitValue>>;
/**
 * Patches the method to first execute the provided function and then
 * the original functionality
 * @param obj Object with the method of interest
 * @param methodName Method name to patch
 * @param fn Function to execute before the original functionality
 */
export declare function patchObjectMethodWith<T, K extends MethodNames<T>>(obj: T, methodName: K, fn: TypeOfClassMethod<T, K>): void;
/**
 * Extract a touched changed observable from an abstract control
 * @param control AbstractControl
 *
 * @usage
 * ```
 * const formControl = new FormControl();
 * const touchedChanged$ = extractTouchedChanges(formControl);
 * ```
 */
export declare function extractTouchedChanges(control: AbstractControl): Observable<boolean>;
/**
 * Extract a dirty changed observable from an abstract control
 * @param control AbstractControl
 *
 * @usage
 * ```
 * const formControl = new FormControl();
 * const dirtyChanged$ = extractDirtyChanges(formControl);
 * ```
 */
export declare function extractDirtyChanges(control: AbstractControl): Observable<boolean>;