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: Least_SRMTL.m
    path of file: ./repos/MALSAR/MALSAR/functions/SRMTL
    
    the code of the file until where you have to start completion: %% FUNCTION Least_SRMTL
%   Sparse Structure-Regularized Learning with Least Squares Loss.
%
%% OBJECTIVE
%   argmin_W { sum_i^t (0.5 * norm
    
function value and gradients of the search point
    gWs  = gradVal_eval(Ws, rho1);
    Fs   = funVal_eval  (Ws, rho1);
    
    while true
        [Wzp l1c_wzp] = l1_projection(Ws - gWs/gamma, 2 * rho2 / gamma);
        Fzp = funVal_eval  (Wzp, rho1);
        
        delta_Wzp = Wzp - Ws;
        r_sum = norm(delta_Wzp, 'fro')^2;
        Fzp_gamma = Fs + trace(delta_Wzp' * gWs) + gamma/2 * norm(delta_Wzp, 'fro')^2;
        
        if (r_sum <=1e-20)
            bFlag=1; % this shows that, the gradient step makes little improvement
            break;
        end