import { EventEmitter } from "@angular/core";
import { Observable } from "rxjs";
export declare abstract class MatSelectAttr {
    abstract valueMember: string;
    abstract displayMember: string;
    abstract isLazy: boolean;
    abstract initSource: any[];
    abstract filterSourceChange: EventEmitter<any[]>;
    abstract filterSource: any[];
    abstract searcher: (search: string) => Observable<any[]>;
    abstract isStringArray: boolean;
    abstract maximumCount: number;
}