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: eegplugin_microstate.m
    path of file: ./repos/Microstate-EEGlab-toolbox/Microstate0.2
    
    the code of the file until where you have to start completion: % eegplugin_microstate()
%
% Usage:
%   >> eegplugin_microstate(fig, trystrs, catchstrs);
%
% Inputs:
%   fig        - [integer] eeglab figure.
%   trystrs    - [struct] "try" strings for menu callbacks.
%   catchstrs  - [struct] "catch" strings for menu callbacks.
%
% Please cite this toolbox as:
% Poulsen, A. T., Pedroni, A., Langer, N., &  Hansen, L. K. (unpublished
% manuscript). Microstate EEGlab toolbox: An introductionary guide.
%
% Author: Andreas Trier Poulsen, atpo@dtu.dk
% Technical University of Denmark, Cognitive systems - February 2017
%
% See also: eeglab

% Copyright (C) 2017  Andreas Trier Poulsen, atpo@dtu.dk
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

function eegplugin_microstate(fig, trystrs, catchstrs)
if nargin < 3
    error('eegplugin_microstate requires 3 arguments');
end

%% Create menus
% Tools menu
toolsmenu = findobj(fig, 'tag', 'tools');
submenutools = uimenu( toolsmenu, 'label', 'Microstate analysis', 'separator', 'on');

% Plot menu
plotmenu = findobj(fig, 'tag', 'plot');
submenuplot = uimenu( plotmenu, 'label', 'Microstate analysis', 'separator', 'on');


%% Menu 
    
function eegplugin_microstate(fig, trystrs, catchstrs)
if nargin < 3
    error('eegplugin_microstate requires 3 arguments');
end

%% Create menus
% Tools menu
toolsmenu = findobj(fig, 'tag', 'tools');
submenutools = uimenu( toolsmenu, 'label', 'Microstate analysis', 'separator', 'on');

% Plot menu
plotmenu = findobj(fig, 'tag', 'plot');
submenuplot = uimenu( plotmenu, 'label', 'Microstate analysis', 'separator', 'on');


%% Menu callback commands for submenus
% Tools submenus
complaceholder = 'error(''sorry function not implemented yet. This is just a placeholder'');';
comdata = [trystrs.no_check complaceholder catchstrs.store_and_hist];
comsegment_simple = [trystrs.no_check complaceholder catchstrs.store_and_hist];
comsegment_advanced = [trystrs.no_check '[EEG LASTCOM]=pop_micro_segment(EEG);' ...
    catchstrs.store_and_hist];
combackfit = [trystrs.no_check '[EEG LASTCOM]=pop_micro_fit(EEG);' ...
    catchstrs.store_and_hist];
comstats = [trystrs.no_check '[EEG LASTCOM]=pop_micro_stats(EEG);' ...
    catchstrs.store_and_hist];

% Plot submenus
scalp_str = 'LASTCOM = [''figure;topo_micro(EEG.microstate.scalp_maps,EEG.chanlocs);'']; eval(LASTCOM);';
complotscalp = [trystrs.no_check scalp_str catchstrs.store_and_hist];
complotseg = [trystrs.no_check '[EEG,LASTCOM] = pop_micro_plotseg(EEG);' ...
    catchstrs.store_and_hist];


%% Create Tools submenus
% Simples segmentation
uimenu( submenutools, 'Label', 'Segment into microstates (Quick start) (placeholder)',...
    'CallBack', comsegment_simple);

% Advanced segmentation
uimenu( submenutools, 'Label', 'Select data for analysis (advanced settings) (placeholder)', ...
    'CallBack', comdata,'separator', 'on');
uimenu( submenutools, 'Label', 'Segment into microstates (advanced settings)', ...
    'CallBack', comsegment_advanced);

% Post segmentation
uimenu( submenutools, 'Label', 'Backfit microstates on EEG', ...
    'CallBack', combackfit,'separator', 'on');
uimenu( submenutools, 'Label', 'Calculate microstate statistics', ...
    'CallBack', comstats);


%% Create Plot submenus
uimenu( submenuplot, 'Label', 'Plot microstates scalp topographies', 'CallBack', complotscalp);
uimenu( submenuplot, 'Label', 'Plot microstate segmentation','CallBack', complotseg);

end