export declare class EmulatorFlagsManager {
    private flags;
    /**
     * Adds flag as argument to emulator start command.
     * Adding same flag name twice replaces existing flag value.
     * @param name flag name. Must be set to non-empty string. May optionally contain -- prefix.
     * @param value flag value. May be empty string.
     * @returns this instance for chaining.
     */
    withFlag(name: string, value: string): this;
    private flagToString;
    /**
     *
     * @returns string with all flag names and values, concatenated in same order they were added.
     */
    expandFlags(): string;
    /**
     * Clears all added flags.
     */
    clearFlags(): void;
}