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: test_bug3378.m
    path of file: ./repos/fieldtrip/test
    
    the code of the file until where you have to start completion: function test_bug3378

% WALLTIME 00:10:00
% MEM 1gb
% DEPENDENCY
% DATA no

data = [];
data.powspctrm = randn(1,10,20);
data.time = 1:20;
data.freq = 1:10;
data.label = {'chan01'};
data.dimord = 'chan_freq_time';
data.mask = data.powspctrm>0;

figure('units','normalized','outerposition',[0 0 1 1]);

subplot(4,4,[5 6 9 10])
cfg=[];
cfg.colorbar = 'no';
ft_singleplotTFR(cfg,data);
title('Unmasked')

% case 1: logical mask, maskalpha < 1, opacity masking
cfg.maskparameter = 'mask';
cfg.maskalpha = 0.2;
subplot(4,4,3);
try
    ft_singleplotTFR(cfg, data); % this works as expected

    
function test_bug3378

% WALLTIME 00:10:00
% MEM 1gb
% DEPENDENCY
% DATA no

data = [];
data.powspctrm = randn(1,10,20);
data.time = 1:20;
data.freq = 1:10;
data.label = {'chan01'};
data.dimord = 'chan_freq_time';
data.mask = data.powspctrm>0;

figure('units','normalized','outerposition',[0 0 1 1]);

subplot(4,4,[5 6 9 10])
cfg=[];
cfg.colorbar = 'no';
ft_singleplotTFR(cfg,data);
title('Unmasked')

% case 1: logical mask, maskalpha < 1, opacity masking
cfg.maskparameter = 'mask';
cfg.maskalpha = 0.2;
subplot(4,4,3);
try
    ft_singleplotTFR(cfg, data); % this works as expected
catch ME
    disp(getReport(ME))
    text(0,.5, 'not supported')
    axis off
end