export class ExpandTransition extends LitElement {
    static properties: {
        show: {
            type: BooleanConstructor;
            reflect: boolean;
        };
        _removeElement: {
            type: BooleanConstructor;
            state: boolean;
        };
    };
    static styles: import("lit").CSSResult[];
    show: boolean;
    _mounted: boolean;
    _removeElement: boolean;
    willUpdate(): void;
    updated(): void;
    get _wrapper(): this;
    render(): import("lit").TemplateResult<1>;
}
import { LitElement } from 'lit';
