export type CalloutType = 'info' | 'warning' | 'success' | 'error' | 'tip' | 'note' | 'important' | 'caution';
export declare class CalloutFeature {
    private editorArea;
    private activePopup;
    private _pickerAC;
    private _savedRange;
    private _onInsert;
    constructor(editorArea: HTMLElement, onInsert?: () => void);
    /** Show 4-item picker anchored to the toolbar button, then insert chosen callout */
    showPicker(anchorBtn: HTMLElement): void;
    closePicker(): void;
    insertCallout(type: CalloutType): void;
    destroy(): void;
}
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