lib/fase-2/commonality.js
function CommonalityInterface(MatrixConstructor, top) {
  this.top = top;
  this.length = null;
  this.matrix = null;

  this.MatrixConstructor = MatrixConstructor;
}
function CommonalityInterface(MatrixConstructor, top) {
  this.top = top;
  this.length = null;
  this.matrix = null;

  this.MatrixConstructor = MatrixConstructor;
}
The exposed API used in all.js