type AccountNameChars = string & {
    readonly _isAccountName: '✅';
};
type IsAccountName<T extends string> = T extends `${infer Char}${infer Rest}` ? Char extends AccountNameChars ? IsAccountName<Rest> : never : T extends '' ? string : never;
export type AccountName = IsAccountName<string>;
export declare function isAccountName(candidate: unknown): candidate is AccountName;
export declare function assertAccountName(candidate: unknown): asserts candidate is AccountName;
export declare function AccountName(candidate: unknown): AccountName;
export {};
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