export type Severity = "info" | "success" | "warn" | "error";
export interface Snackbar {
    add(msg: string, opts?: {
        severity?: Severity;
        life?: number;
    }): void;
    exception(err: Error, life?: number): void;
    success(msg: string, life?: number): void;
    info(msg: string, life?: number): void;
    warn(msg: string, life?: number): void;
}