code: function() {
          return "| " + this.matrix[0][0] + " " + this.matrix[0][1] + " " + this.matrix[0][2] + " " + this.matrix[0][3] + " |\n" + "| " + this.matrix[1][0] + " " + this.matrix[1][1] + " " + this.matrix[1][2] + " " + this.matrix[1][3] + " |\n" + "| " + this.matrix[2][0] + " " + this.matrix[2][1] + " " + this.matrix[2][2] + " " + this.matrix[2][3] + " |\n" + "| " + this.matrix[3][0] + " " + this.matrix[3][1] + " " + this.matrix[3][2] + " " + this.matrix[3][3] + " |";
      }
docs: /*
  (non-Javadoc)
  
  @see java.lang.Object#toString()