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: db_group_conditions.m
    path of file: ./repos/brainstorm3/toolbox/db
    
    the code of the file until where you have to start completion: function db_group_conditions( ConditionsPaths, newConditionName )
% DB_GROUP_CONDITIONS: Combine many conditions in one (averaging the electrodes positions if necessary).
%
% USAGE:  db_group_conditions( ConditionsPaths, newConditionName )
%         db_group_conditions( ConditionsPaths )

% @=============================================================================
% This function is part of the Brainstorm software:
% https://neuroimage.usc.edu/brainstorm
% 
% Copyright (c) University of Southern California & McGill University
% This software is distributed under the terms of the GNU General Public License
% as published by the Free Software Foundation. Further details on the GPLv3
% license can be found at http://www.gnu.org/copyleft/gpl.html.
% 
% FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
% UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
% WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
% MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
% LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
%
% For more information type "brainstorm license" at command prompt.
% =============================================================================@
%
% Authors: Francois Tadel, 2009-2013

% ===== GET NEW CONDITION NAME =====
% Get protocol directories
ProtocolInfo = bst_get('ProtocolInfo');
% Get condition name
oldConditionName = '';
% Get new condition name

    
function db_group_conditions( ConditionsPaths, newConditionName )
% DB_GROUP_CONDITIONS: Combine many conditions in one (averaging the electrodes positions if necessary).
%
% USAGE:  db_group_conditions( ConditionsPaths, newConditionName )
%         db_group_conditions( ConditionsPaths )

% @=============================================================================
% This function is part of the Brainstorm software:
% https://neuroimage.usc.edu/brainstorm
% 
% Copyright (c) University of Southern California & McGill University
% This software is distributed under the terms of the GNU General Public License
% as published by the Free Software Foundation. Further details on the GPLv3
% license can be found at http://www.gnu.org/copyleft/gpl.html.
% 
% FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
% UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
% WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
% MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
% LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
%
% For more information type "brainstorm license" at command prompt.
% =============================================================================@
%
% Authors: Francois Tadel, 2009-2013

% ===== GET NEW CONDITION NAME =====
% Get protocol directories
ProtocolInfo = bst_get('ProtocolInfo');
% Get condition name
oldConditionName = '';
% Get new condition name
if (nargin < 2) || isempty(newConditionName)
    % Ask user new Comment field
    newConditionName = java_dialog('input', 'New condition name', 'Group condition', [], oldConditionName);
    % If user did not answer or did not change the Comment field: ignore modification
    if isempty(newConditionName) || strcmpi(newConditionName, oldConditionName)
        return;
    end