/**
 * Gets a string with replaced special chars on their HTML entities.
 * @param str{String} - source string
 * @return {string}
 * @example
 * // How to escape special HTML characters?
 * const str = "<b>Hello world & underworld!</b>";
 * const escaped = getStrEscaped(str);
 * console.log(escaped); // => "&lt;b&gt;Hello world &amp; underworld!&lt;/b&gt;"
 */
export function getStrEscaped(str: string): string;
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