You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cat_main.m
    path of file: ./repos/cat12
    
    the code of the file until where you have to start completion: function Ycls = cat_main(res,tpm,job)
% ______________________________________________________________________
% Write out CAT preprocessed data
%
% FORMAT Ycls
    
function ####
  % 
  if 0 % job.extopts.WMHC || job.extopts.SLC
    stime = cat_io_cmd(sprintf('Fast registration'),'','',job.extopts.verb); 

    res2 = res; 
    job2 = job;
    job2.extopts.verb       = debug;  % do not display process (people would may get confused) 
    job2.extopts.vox        = abs(res.tpm(1).mat(1));  % TPM resolution to replace old Yy  
    if job.extopts.regstr>0
      job2.extopts.regstr     = 15;     % low resolution 
      job2.extopts.reg.nits   = 16;     % less iterations
      job2.extopts.reg.affreg = 0;      % new affine registration
      job2.extopts.shootingtpms(3:end