import Style from "../components/styles";
/**
 * The StyleManager class manages styles that are added to the page dynamically.
 */
export default class StyleManager {
    /**
     * An array of styles that have been added to the page.
     */
    static styles: Style[];
    /**
     * Adds a style to the page.
     * @param {Style} style - The style to add.
     */
    static addStyle(style: Style): void;
    /**
     * Removes a style from the page.
     * @param {Style} style - The style to remove.
     */
    static removeStyle(style: Style): void;
    /**
     * Returns the CSS text for all styles that have been added to the page.
     * @returns {string} - The CSS text for all styles.
     */
    static toString(): string;
    /**
     * Checks if a style has already been added to the page.
     * @param {Style} style - The style to check.
     * @returns {boolean} - true if the style has already been added, false otherwise.
        */
    static isStyleAdded(style: Style): boolean;
    /**
     * Returns an array of all external styles that have been added to the page.
     * @returns {Array<Style>} - An array of all external styles.
     */
    static getExternalStyles(): Array<Style>;
}