docs: private static AbstractExpression transformExpressionRidofPVE(AbstractExpression src) {
          AbstractExpression left = src.getLeft(), right = src.getRight();
          if (left != null) {
              left = transformExpressionRidofPVE(left);
          }
          if (right != null) {
              right = transformExpressionRidofPVE(right);
          }
          final AbstractExpression dst;
          if (src instanceof ParameterValueExpression) {      //
              assert(((ParameterValueExpression) src).getOriginalValue() != null);
              dst = ((ParameterValueExpression) src).getOriginalValue().clone();
          } else {
              dst = src.clone();
          }
          dst.setLeft(left);
          dst.setRight(right);
          return dst;
      }