/**
 * Internal element type.
 */
export declare enum TimelineElementType {
    /**
     * Timeline
     */
    Timeline = "timeline",
    /**
     * Keyframes
     */
    Keyframe = "keyframe",
    /**
     * Keyframes connected and presenting one group.
     */
    Group = "group",
    /**
     * Timeline row.
     */
    Row = "row",
    None = "none"
}