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_vb_w.m
    path of file: ./repos/spm
    
    the code of the file until where you have to start completion: function [block] = spm_vb_w(Y,block)
% Variational Bayes for GLM-AR modelling in a block - update w
% FORMAT [block] = spm_vb_w (Y,block)
%
% Y          - [T x N] time series 
% block      - data structure (see spm_vb_glmar)
%__________________________________________________________________________

% Will Penny and Nelson Trujillo-Barreto
% Copyright (C) 2005-2022 Wellcome Centre for Human Neuroimaging


    
function [block] = spm_vb_w(Y,block)
% Variational Bayes for GLM-AR modelling in a block - update w
% FORMAT [block] = spm_vb_w (Y,block)
%
% Y          - [T x N] time series 
% block      - data structure (see spm_vb_glmar)
%__________________________________________________________________________

% Will Penny and Nelson Trujillo-Barreto
% Copyright (C) 2005-2022 Wellcome Centre for Human Neuroimaging


if block.verbose
    disp('Updating w');
end