export declare const MISSING_LABEL = "n/a";
export declare const MISSING_COLOR: {
    color: string;
    background: string;
};
export declare const MISSING_ITEM_VALUE = "__missing__";
export declare const MISSING_LEGEND_ITEM: {
    index: number;
    label: string;
    color: {
        color: string;
        background: string;
    };
};