/**
 * Formats users' account name for display
 * - If the account name is shorter than 15 characters, it will be displayed as is
 * - If the account name is longer than 15 characters, it will be shortened to 12 characters + 3 ellipsis
 * - Additionally, If it is an email, the suffix will be removed
 *
 * Examples:
 * - `chloe@fun.xyz` -> `chloe@fun.xyz`
 * - `longname@outlook.com` -> `longname`
 * - `supersuperlongname@gmail.com` -> `supersuperlo...`
 * - `@chloefunxyz` -> `@chloefunxyz`
 * - `@chloefunxyzlongtwittername` -> `@chloefunxyz...`
 */
export declare function formatAccountName(accountName: string, isEmail: boolean): string;