/**
 * Shared navigation helpers for zoom/pan behavior.
 */
export interface NavSeriesLike {
    isVisible(): boolean;
    getType(): string;
}
/**
 * Pin Y minimum to 0 only for pure volume-style bar charts (bars only, no overlays).
 * Mixed indicator panes (histogram + lines) get full Y pan/zoom freedom.
 */
export declare function usesVolumeBarPinning(series: Iterable<NavSeriesLike>): boolean;