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: panel_command.m
    path of file: ./repos/brainstorm3/toolbox/gui
    
    the code of the file until where you have to start completion: function varargout = panel_command(varargin)
% PANEL_COMM
    
function declaration
                if isempty(argList)
                    iDelete(end+1) = i;
                % Replace arguments with inputs
                else
                    argNames = str_split(cellLines{i}(iParent1+1:iParent2-1), ',');
                    % Number of arguments must match the number of inputs
                    if (length(argNames) ~= length(varargin))
                        error('The number of argmuents in the function does not match the number of parameters passed in the command line.');
                    end