Is a MatFile object derived from the handle class?

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I'm using a MatFile object to avoid loading a large mat file into memory. The MatFile object is used as an input to a function where I append my data. Does the MatFile object act like a handle, only referencing the object on my disk from inside my function? A rough example is shown here:
measurement = matfile(filename, 'Writable', true);
measurement.TimeStamps = 0;
measurement.Data = zeros(1, 2);
function measurement = saveData(event, measurement)
size_timestamp = size(measurement, 'TimeStamps');
measurement.TimeStamps(size_timestamp(1) + 1, 1) = event.TimeStamps(end);
measurement.Data(size_timestamp(1) + 1, :) = mean(event.Data);

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