/**
 * A guard is expected to expose an "approve" method that returns a boolean
 *
 * <p>Note: a guard does not need to implement this interface.
 * Any object that exposes an "approve" method can be used as a guard.</p>
 */
export interface IGuard {
    /**
     * Does this guard approve of this action?
     *
     * @return Approval
     */
    approve(): boolean;
}