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: plotlysetup_offline.m
    path of file: ./repos/plotly_matlab
    
    the code of the file until where you have to start completion: function plotlysetup_offline(plotly_bundle_url, varargin)

    % CALL: plotlysetup_offline(plotly_bundle_url);
    % WHERE: plotly_bund
    
function 
    function message = permissionMessage(spec)
    message = ['\n\nShoot! We tried to ' spec ' to the MATLAB toolbox \n',...
        'directory, but were denied write permission. You''ll have to add\n',...
        'the Plotly folder to your MATLAB path manually by running: \n\n',...
        '>> plotly_path = fullfile(pwd, ''plotly'')\n',...
        '>> addpath(genpath(plotly_path))\n\n',...
        'Questions? Ask https://community.plotly.com/c/api/matlab/\n\n'];
    end