import { SimpleChange, SimpleChanges, ɵComponentDef as ComponentDef } from '@angular/core';
export declare abstract class NgEvent<T = SimpleChanges | SimpleChange> {
    readonly component: ComponentDef<any>;
    readonly extra?: SimpleChanges | SimpleChange;
    static ngMethodName: string;
    static multiple: boolean;
    protected constructor(component: ComponentDef<any>, extra?: SimpleChanges | SimpleChange);
}