function sendTokensArray(
        address[] beneficiaries,
        uint256 amount
    )
        external
        onlyOwner
    {
        require(beneficiaries.length > 0, "Array length has to be greater than zero");

        for (uint256 i = 0; i < beneficiaries.length; i++) {
            _sendTokens(beneficiaries[i], amount);
        }
    }