/**
 * Ids of the built-in widget header items, in the order they appear in the header row.
 *
 * Use these as `target`s for the `before`/`after` position of a {@link WidgetHeaderItem}.
 * A target stays valid even when its item is not currently shown (e.g. the menu button when the
 * widget has no menu items, or a spacer that currently takes no width): the position resolves as if
 * the built-in were there, so a custom item lands in a stable spot regardless of which built-ins
 * happen to be visible.
 */
export declare const WidgetHeaderTargets: {
    /**
     * The drag-handle icon, shown at the far left while the widget can be dragged (a dashboard in
     * edit mode). It is the widget's primary drag affordance.
     */
    readonly DragIcon: "widget-header-drag-icon";
    /**
     * The “Jump to Dashboard” icon, shown to the left of the title when the widget has a JTD target.
     */
    readonly JtdIcon: "widget-header-jtd-icon";
    /**
     * The leading spacer, before the title.
     *
     * Together with {@link WidgetHeaderTargets.Spacer} it positions the title: it takes no width when
     * the title is left-aligned, grows when the title is right-aligned, and shares the free width with
     * the trailing spacer when the title is centered.
     */
    readonly TitleAlignmentSpacer: "widget-header-title-alignment-spacer";
    /** The widget title. Takes its content width and ellipsizes when the header is too narrow. */
    readonly Title: "widget-header-title";
    /**
     * The trailing spacer, between the title and the action items — the anchor that
     * `{ type: 'auto' }` items are placed after. Grows unless the title is right-aligned.
     */
    readonly Spacer: "widget-header-spacer";
    /**
     * The "clear selection" button, shown while the widget has a common-filter selection to clear.
     */
    readonly ClearSelectionButton: "widget-header-clear-selection-button";
    /** The info ("i") button, which opens the widget's dataset/description popover. */
    readonly InfoButton: "widget-header-info-button";
    /** The narrative ("sparkle") button, which shows or hides the widget's generated narrative. */
    readonly NarrativeToggle: "widget-header-narrative-toggle";
    /** The header menu ("⋮") button. Not shown while the menu has no items. */
    readonly Menu: "widget-header-menu";
};
/**
 * Union of the built-in widget header item ids, usable as `target` for `before`/`after` positions.
 */
export type WidgetHeaderTarget = (typeof WidgetHeaderTargets)[keyof typeof WidgetHeaderTargets];