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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def ctrl_alt_del(vm_, **kwargs):
    '''
    Sends CTRL+ALT+DEL to a VM

    :param vm_: domain name
    :param connection: libvirt connection URI, overriding defaults

        .. versionadded:: 2019.2.0
    :param username: username to connect with, overriding defaults

        .. versionadded:: 2019.2.0
    :param password: password to connect with, overriding defaults

        .. versionadded:: 2019.2.0

    CLI Example:

    .. code-block:: bash

        salt '*' virt.ctrl_alt_del <domain>
    '''
    conn = __get_conn(**kwargs)
    dom = _get_domain(conn, vm_)
    ret = dom.sendKey(0, 0, [29, 56, 111], 3, 0) == 0
    conn.close()
    return ret