addStuffToDiagonal method

void addStuffToDiagonal()

Adding small boxed data-areas to DiagonalList. At the end this should be user - server -in-data stuff.

Implementation

void addStuffToDiagonal() {
  //  Using this method from tl, tools library.
  //  Problem is, that #matrix should be publicly visible.
  //  tl.boxInList(_r, _c, __l, _matrix);
}