/**
 * Whether the color is a gradient
 * @param g - color to test
 * @return
 * @memberOf Util
 */
export declare function isGradient(g: Object): boolean;
/**
 * Get stamp of a gradient color object.
 * @param g gradient color object
 * @return gradient stamp
 * @memberOf Util
 */
export declare function getGradientStamp(g: Object): string;
export declare function getSymbolStamp(symbol: Object, prefix: string): string | number;
/**
 * Get stamp of a symbol
 * @param symbol symbol
 * @return symbol's stamp
 * @memberOf Util
 */
export declare function getSymbolHash(symbol: Object | Object[], prefix?: string): string | number;
/**
 * Reduce opacity of the color by ratio
 * @param symbol symbols to set
 * @param ratio  ratio of opacity to reduce
 * @return new symbol or symbols
 * @memberOf Util
 */
export declare function lowerSymbolOpacity(symbol: Object | Object[], ratio: number): Object | Object[];
/**
 * Merges the properties of sources into the symbol. <br>
 * @param args - sources
 * @return merged symbol
 * @memberOf Util
 */
export declare function extendSymbol(...args: Object[]): Object | Object[];
export declare function parseStyleRootPath(style: any): any;
export declare function convertStylePath(styles: any[], replacer: any): void;
export declare function parseSymbolPath(symbol: any, replacer: string): void;
/**
 * geometry symbol has lineDasharray
 * @memberOf Util
 */
export declare function isDashLine(symbolizers?: any[]): boolean;
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