docs: private void voltConvertBinaryLiteralOperandsToBigint() {
          // Strange that CONCAT is an arithmetic operator.
          // You could imagine using it for VARBINARY, so
          // definitely don't convert its operands to BIGINT!
          assert(opType != OpTypes.CONCAT);
  
          for (int i = 0; i < nodes.length; ++i) {
              Expression e = nodes[i];
              ExpressionValue.voltMutateToBigintType(e, this, i);
          }
      }