lib/fase-2/commonality-element.js
function ElementMatrix(top) {
  CommanalityMatrix.call(this, top);

  this.row(' ');
  this.collum(' ');
  this.classlist = top.root.classlist;
}
function ElementMatrix(top) {
  CommanalityMatrix.call(this, top);

  this.row(' ');
  this.collum(' ');
  this.classlist = top.root.classlist;
}
Collects features and bind them to the node density