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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 list_nodes_min():
    '''
    Return a list of registered VMs, with minimal information

    CLI Example:

    .. code-block:: bash

        salt '*' vboxmanage.list_nodes_min
    '''
    ret = {}
    cmd = '{0} list vms'.format(vboxcmd())
    for line in salt.modules.cmdmod.run(cmd).splitlines():
        if not line.strip():
            continue
        comps = line.split()
        name = comps[0].replace('"', '')
        ret[name] = True
    return ret