export declare const F_CSS_CLASS: {
    DRAG_AND_DROP: {
        DRAGGING: string;
        CONNECTIONS_DRAGGING: string;
    };
    CONNECTOR: {
        OUTPUT_CONNECTED: string;
        OUTPUT_NOT_CONNECTABLE: string;
        INPUT_CONNECTED: string;
        INPUT_NOT_CONNECTABLE: string;
        INPUT_CAN_BE_CONNECTED_TO: string;
    };
    CONNECTION: {
        DRAG_HANDLE: string;
    };
};