docs: @Override
      public final void visitConversionInstruction(ConversionInstruction obj) {
          visitConversionInstruction2(obj);
          if (obj instanceof NULL2Z) {
              visitNULL2Z((NULL2Z) obj);
          } else if (obj instanceof NONNULL2Z) {
              visitNONNULL2Z((NONNULL2Z) obj);
          }
      }