export declare class Constants {
    static FixedRadius: number;
    static LANG_LABEL_TEXT: string;
    static LANG_UNDEFINED: string;
    static validURL(str: any): boolean;
    static CLASS_RADIUS: number;
    static THING_RADIUS: number;
    static SPACE_BETWEEN_SPANS: number;
    static ADDITIONAL_TEXT_SPACE: number;
    static CARDINALITY_HDISTANCE: number;
    static CARDINALITY_VDISTANCE: number;
    static SPECIAL_OPERATIONS_RADIUS: number;
    static LITERAL_HEIGHT: number;
    static LITERAL_WIDTH: number;
    static CHARGE: number;
    static LABEL_HEIGHT: number;
    static LABEL_WIDTH: number;
    static DATA_TYPE_LINK_DISTANCE: number;
    static LINK_DISTANCE: number;
    static LOOP_LINK_DISTANCE: number;
}