export declare const AUTO_CLASSED = "autoseisplotjs";
export declare const AUTO_COLOR_SELECTOR = "seisplotjsautocolor";
export declare const G_DATA_SELECTOR = "seisplotjsdata";
/**
 * Inserts text as css into the head of an html document. No checking
 * as to validity of the css is done, just inserts a style
 * element at the beginning of the head.
 *
 * @param  cssText textual css for insertion
 * @param id optional id for style element
 * @returns the style html element inserted
 */
export declare function insertCSS(cssText: string, id: string): HTMLElement;
export declare function isCSSInserted(id: string): boolean;
export declare function isIdStyleElement(c: Element, id: string): boolean;
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