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: spm_preproc_run.m
    path of file: ./repos/spm
    
    the code of the file until where you have to start completion: function varargout = spm_preproc_run(job,action)
% Segment a bunch of images
% FORMAT spm_preproc_run(job)
% job.channel(n).vols{m}
% job.channel(n).biasreg
% job.channel(n).biasfwhm
% job.channel(n).write
% job.tissue(k).tpm
% job.tissue(k).ngaus
% job.tissue(k).native
% job.tissue(k).warped
% job.warp.mrf
% job.warp.cleanup

    
function varargout = spm_preproc_run(job,action)
% Segment a bunch of images
% FORMAT spm_preproc_run(job)
% job.channel(n).vols{m}
% job.channel(n).biasreg
% job.channel(n).biasfwhm
% job.channel(n).write
% job.tissue(k).tpm
% job.tissue(k).ngaus
% job.tissue(k).native
% job.tissue(k).warped
% job.warp.mrf
% job.warp.cleanup
% job.warp.affreg
% job.warp.reg
% job.warp.fwhm
% job.warp.samp
% job.warp.write
% job.warp.bb
% job.warp.vox
% job.iterations
% job.alpha
%
% See the batch interface for a description of the fields.
%
% See also spm_preproc8.m amd spm_preproc_write8.m
%__________________________________________________________________________

% John Ashburner
% Copyright (C) 2008-2022 Wellcome Centre for Human Neuroimaging


if nargin == 1, action = 'run'; end