/**
 * Obfuscates a string by replacing certain characters with a symbol.
 *
 * @param value the input string to obfuscate
 * @param symbol the symbol for obfuscation
 * @return the obfuscated string
 *
 * The function determines which characters to obfuscate using a regular expression and the string's length:
 * - 8 or more: show first 2 and last 2 characters
 * - 4 to 7: show first and last character
 * - less than 4: obfuscate all characters
 * - obfuscates only alphanumeric characters
 */
export declare function tuiObfuscate(value: string, symbol: string): string;