MathPHP\LinearAlgebra\MatrixTest::dataProviderForJsonSerialize PHP Method

    public function dataProviderForJsonSerialize()
    {
        return [[[[1, 2, 3], [4, 5, 6], [7, 8, 9]], '[[1,2,3],[4,5,6],[7,8,9]]'], [[[1]], '[[1]]']];
    }