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_fMRI_design_show.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8
    
    the code of the file until where you have to start completion: function spm_fMRI_design_show(SPM,s,i)
% Interactive review of fMRI design matrix
% FORMAT spm_fMRI_design_show(SPM,s,i)
%

    
function spm_fMRI_design_show(SPM,s,i)
% Interactive review of fMRI design matrix
% FORMAT spm_fMRI_design_show(SPM,s,i)
%
% Sess(s).U(i)  -  see spm_fMRI_design for session s, trial i.
%
%_______________________________________________________________________
% Copyright (C) 2008 Wellcome Trust Centre for Neuroimaging

% Karl Friston
% $Id: spm_fMRI_design_show.m 2021 2008-08-27 10:05:32Z volkmar $


% SPM
%-----------------------------------------------------------------------
if nargin == 0
    load(spm_select(1,'^SPM\.mat$','Select SPM.mat'));
end

Sess  = SPM.Sess;

% Do not proceed unless there are trials specified
%-----------------------------------------------------------------------
for j = 1:length(Sess)
    if ~length(Sess(j).U)
        spm('alert*','User-specifed regressors only!',mfilename,sqrt(-1));
        return
    end
end

%-Defaults: Setup GUI if not called by spm_DesRep (with s and i)
%-----------------------------------------------------------------------
if nargin < 3
    s = 1;
    i = 1;

    %-Get Interactive window and delete any previous DesRepUI menu
    %---------------------------------------------------------------
    Finter = spm_figure('GetWin','Interactive');
    delete(findobj(get(Finter,'Children'),'flat','Tag','DesRepUI'))

    %-Create menu
    %---------------------------------------------------------------
    hC     = uimenu(Finter,'Label','Explore fMRI design',...
        'Separator','on',...
        'Tag','DesRepUI',...
        'UserData',SPM,...
        'HandleVisibility','on');
    for j = 1:length(Sess)
        h     = uimenu(hC,'Label',sprintf('Session %.0f ',j),...
            'HandleVisibility','off');
        for k = 1:length(Sess(j).Fc)
            cb = ['tmp = get(get(gcbo,''UserData''),',...
                             '''UserData''); ',...
                sprintf(['spm_fMRI_design_show(',...
                    'tmp,%d,%d);'],j,k)];
            uimenu(h,'Label',Sess(j).Fc(k).name,...
                         'CallBack',cb,...
                         'UserData',hC,...
                         'HandleVisibility','off')
        end