export declare enum UIType {
    UNKNOWN = "unknown",
    TRANSFORMER_MASK = "transformer-mask",
    TRANSFORMER_ANCHOR = "transformer-anchor",
    HIGHLIGHTER = "highlighter",
    BRUSH = "brush",
    LABEL = "label",
    SNAP_POINT = "snap-point",
    SNAP_LINE = "snap-line"
}
/**
 * UI should be rendered on top of everything else.
 * UI should not be exported.
 */
export declare class UI {
    type: UIType;
    constructor(type?: UIType);
}