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_deformations.m
    path of file: ./repos/spm12
    
    the code of the file until where you have to start completion: function out = spm_deformations(job)
% Various deformation field utilities
% FORMAT out = spm_deformations(job)
% job - a job created via spm_cfg_deformations.m
% out - a struct with fields
%       .def    - file name of created deformation field
%       .warped - file names of warped images
%
% See spm_cfg_deformations.m for more information.
%__________________________________________________________________________
% Copyright (C) 2005-2015 Wellcome Trust Centre for Neuroimaging

% John Ashburner
% $Id: spm_deformations.
    
function [Def,mat] = get_job(job)
%==========================================================================
function [Def,mat] = get_job(job)
% Determine what is required, and pass the relevant bit of the
% job out to the appropriate function.

fn = fieldnames(job);
fn = fn{1};
switch fn
    case {'comp'}
        [Def,mat] = get_comp(job.(fn));
    case {'def'}
        [Def,mat] = get_def(job.(fn));
    case {'dartel'}
        [Def,mat] = get_dartel(job.(fn));
    case {'sn2def'}
        [Def,mat] = get_sn2def(job.(fn));
    case {'inv'}
        [Def,mat] = get_inv(job.(fn));
    case {'id'}
        [Def,mat] = get_id(job.(fn));
    case {'idbbvox'}
        [Def,mat] = get_idbbvox(job.(fn));
    otherwise
        error('Unrecognised job type');
end