import "./register.css";
import { type ReactNode } from "react";
import { type SortHeaderLabels, type SortState } from "./sort_header";
import { type PartAttrs } from "./style_props";
/**
 * THE BAND OF LABELS, and it STAYS. The caller's own header part rides the same
 * element: this states the band, the caller's states its layout.
 */
export declare function RegisterHead({ attrs, children }: {
    attrs: PartAttrs;
    children: ReactNode;
}): import("react").JSX.Element;
export interface RegisterHeadingProps {
    /** The column's name, sentence case. Omit for a control column. */
    label?: string;
    /** A header that is not a WORD — a ruler of positions. Rendered in place of
     *  `label`, which stays the column's name for sorting. */
    header?: ReactNode;
    sortKey: string;
    sortable?: boolean;
    sort?: SortState | null;
    onSort?: (key: string) => void;
    align?: "left" | "right";
    labels?: SortHeaderLabels;
}
/**
 * ONE COLUMN HEADING for every register. Chrome, not a heading: the body rung so
 * it stays legible, a weight below the values it heads, a step back in ink.
 */
export declare function RegisterHeading(props: RegisterHeadingProps): string | number | bigint | boolean | import("react").JSX.Element | Iterable<ReactNode> | Promise<string | number | bigint | boolean | Iterable<ReactNode> | import("react").ReactElement<unknown, string | import("react").JSXElementConstructor<any>> | import("react").ReactPortal | null | undefined> | null;