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: pspm_rev_con.m
    path of file: ./repos/PsPM/src
    
    the code of the file until where you have to start completion: function varargout = pspm_rev_con(model)

    
function varargout = pspm_rev_con(model)
% ● Description
%   pspm_rev_con is a tool for reviewing contrasts of first level models
% ● Format
%   fighandle = pspm_rev_con(modelfile)
% ● Arguments
%   modelfile: filename and path of modelfile
% ● History
%   Introduced in PsPM 3.0
%   Written in 2008-2015 by Dominik R Bach (UZH, WTCN)

%% Initialise
global settings
if isempty(settings)
  pspm_init;
end