import { InternalPanel } from '../../internal/types/internal-panels';
import { PanelDirective } from './panel.directive';
export declare abstract class PanelChangeDirective {
    protected readonly _layoutPanel: PanelDirective;
    protected constructor(_layoutPanel: PanelDirective);
    protected numberElse: (a: any, b: number) => number;
    protected patch(patcher: (panel: InternalPanel) => Partial<InternalPanel>): void;
}