code: private void parseMultiplicativeExpr() throws TTXPathException {
  
          parseUnionExpr();
  
          String op = mToken.getContent();
          while (isMultiplication()) {
  
              // for (Operators op : Operators.values()) {
              // // identify current operator
              // if (is(op.getOpName(), true)) {
  
              mPipeBuilder.addExpressionSingle();
  
              // parse second operand axis
              parseUnionExpr();
  
              mPipeBuilder.addOperatorExpression(getTransaction(), op);
              op = mToken.getContent();
              // }
              // }
          }
      }
docs: Parses the the rule MultiplicativeExpr according to the following
  production rule:
  <p>
  [13] MultiplicativeExpr ::= UnionExpr ( ("*" | "div" | "idiv" | "mod") UnionExpr )* .
  </p>
  
  @throws TTXPathException