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    function isAuthorized(address account) external view override returns (bool) {
        return _authorized[account];
    }


    // Override de la fonction _beforeTokenTransfer pour la conformité
    function _beforeTokenTransfer(address sender, address recipient, uint256 amount) internal override {
        super._beforeTokenTransfer(sender, recipient, amount);
        require(isAuthorized(recipient), "ERC1400: receiver is not authorized");
    }