code: @Override
      public String visit(final JmesPathNotExpression notExpression,
                          final Void aVoid) throws InvalidTypeException {
          return "new JmesPathNotExpression( " + notExpression.getExpr()
                  .accept(this, aVoid) + " )";
      }
docs: Generates the code for a new JmesPathNotExpression.
  
  @param notExpression JmesPath not-expression type
  @param aVoid         void
  @return String that represents a call to
  the new not-expression
  @throws InvalidTypeException