human
Solve the following python programming problem given the following code:
def netstats() : 
    "
    Return the network stats for this minion

    CLI Example:

    .. code-block:: bash

        salt '*' status.netstats
    " 
    def linux_netstats() : 
        '
        freebsd specific netstats implementation
        ' 
        procf = '/proc/net/netstat' 
        if (not os.path.isfile (procf)) : 
            return { 
                
} 
stats = salt.utils.fopen (procf, 'r').read ().splitlines () 
        ret = { 
            
} 
        headers = [''] 
        for line in stats : 
            if (not line) : 
                continue 
comps = line.split () 
            if (comps [0] == headers [0]) : 
                index = (len (headers) - 1) 
                row = { 
                    
} 
                for field in range (index) : 
                    if (field < 1) : 
                        continue 
else : 
                        row [headers [field]] = _number (comps [field]) 
rowname = headers [0].replace (':', '') 
                ret [rowname] = row 
else : 
                headers = comps 
return ret 
def freebsd_netstats() : 
        '
        freebsd specific netstats implementation
        ' 
        ret = { 
            
} 
        for line in __salt__ ['cmd.run'] ('netstat -s').splitlines () : 
            if line.startswith ('\t\t') : 
                continue 
if (not line.startswith ('\t')) : 
                key = line.split () [0] 
                ret [key] = { 
                    
} 
else : 
                comps = line.split () 
                if comps [0].isdigit () : 
                    ret [key] [' '.join (comps [1 :])] = comps [0] 
return ret 
get_version = { 
        'Linux' : linux_netstats, 
        'FreeBSD' : <MASK>, 
} 
    errmsg = 'This method is unsupported on the current operating system!' 
    return get_version.get (__grains__ ['kernel'], (lambda : errmsg)) () 
    
    Given the code above, what is a proper replacement for <MASK>?
assistant
#Here is a proper replacement for <MASK>.
def freebsd_netstats(