import "./datum_lead.css";
import type { ReactNode } from "react";
import { type StyleProps } from "./style_props";
/** A datum's mark: the smallest whose initial reads (`identityRung("datum")`), which its label column budgets. */
export declare const DATUM_LEAD: number;
/** Some datum of a run leads with a mark, so every one holds the slot. */
export declare function leadsAny(data: readonly {
    label: string;
    leading?: ReactNode;
}[]): boolean;
/**
 * A CHART DATUM'S LEAD — the mark its name leads with where the datum is someone or something with a face: a
 * person's `Avatar`, a linked row's picture. Unsized, the mark takes a datum's rung (`DATUM_LEAD`). Every datum of a
 * run holds the slot where any does, empty for one with no face (nobody, the folded rest), so the names start at
 * one x.
 */
export declare function DatumLead({ mark, ...props }: StyleProps & {
    mark: ReactNode;
}): import("react").JSX.Element;