object(Matrix\Matrix)#9 (3) {
  ["rows":protected]=>
  int(4)
  ["columns":protected]=>
  int(5)
  ["grid":protected]=>
  array(4) {
    [0]=>
    array(5) {
      [0]=>
      int(1)
      [1]=>
      int(3)
      [2]=>
      int(2)
      [3]=>
      int(0)
      [4]=>
      int(0)
    }
    [1]=>
    array(5) {
      [0]=>
      int(2)
      [1]=>
      int(3)
      [2]=>
      int(1)
      [3]=>
      int(0)
      [4]=>
      int(0)
    }
    [2]=>
    array(5) {
      [0]=>
      int(0)
      [1]=>
      int(0)
      [2]=>
      int(0)
      [3]=>
      int(1)
      [4]=>
      int(6)
    }
    [3]=>
    array(5) {
      [0]=>
      int(0)
      [1]=>
      int(0)
      [2]=>
      int(0)
      [3]=>
      int(0)
      [4]=>
      int(1)
    }
  }
}