}
    rewriter.replaceOpWithNewOp<UnrealizedConversionCastOp>(op, newType,
                                                            op->getOperands());
    return success();
  }
};

class HandleCall : public OpInterfaceRewritePattern<CallOpInterface> {
  // Optional-agnostic pattern that propagates types across the program.
  using OpInterfaceRewritePattern::OpInterfaceRewritePattern;