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: SGECF.m
    path of file: ./repos/PlatEMO/PlatEMO/Algorithms/Multi-objective optimization/SGECF
    
    the code of the file until where you have to start completion: classdef SGECF < ALGORITHM
% <multi> <real/binary> <large/none> <constrained/none> <sparse>
% Sparsity-guided elitism co-evolutionary fr
    
function main(Algorithm,Problem)
            %% Population initialization
            % Calculate the fitness of each decision variable
            TDec    = [];
            TMask   = [];
            TempPop = [];
            Fitness = zeros(1,Problem.D);
            REAL    = ~strcmp(Problem.encoding,'binary');
            for i = 1 : 1+3*REAL
                if REAL
                    Dec = unifrnd(repmat(Problem.lower,Problem.D,1),repmat(Problem.upper,Problem.D,1));
                else
                    Dec = ones(Problem.D,Problem.D);
                end