// get the RowLocation template
exprFun.getField(lf); // instance for setColumn
exprFun.push(highestColumnNumber + 1); // first arg
exprFun.pushThis(); // instance for getRowLocationTemplate
exprFun.push(savedItem); // first arg
exprFun.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Activation, "getRowLocationTemplate",
ClassName.RowLocation, 1);
exprFun.upCast(ClassName.DataValueDescriptor);