import { MatSnackBar } from '@angular/material/snack-bar';
export declare class FlashService {
    private _snackBar;
    constructor(_snackBar: MatSnackBar);
    /**
     * @description method to open snakbar based on params
     * @param message The message to show in the snackbar.
     * @param action The label for the snackbar action.
     * @param type The type of snackbar, basically colour
     * @param duration The length of time in milliseconds to wait before automatically dismissing the snack bar.
     */
    openSnackBar(message: string, action: string, type?: string, duration?: number): void;
    /**
     * @description Closes currently visible snack bar.
     */
    closeSnackBar(): void;
}