import { Base, Type } from "./type";
import { Brush } from "./Brush";
import { LinearGradientBrush } from "./LinearGradientBrush";
import { GradientStop } from "./GradientStop";
/**
 * @hidden
 */
export declare class BrushUtilCore extends Base {
    static $t: Type;
    static a(a: Brush): boolean;
    static c(a: LinearGradientBrush): boolean;
    static b(a: GradientStop): boolean;
}