The idea is that we have an optional argument, -addOperation:overwriteExisting, which lets you make a choice. By default it would throw an error if one already exists, forcing you to make a choice to either rename the output variables or actually overwrite.
The idea is that we have an optional argument, -addOperation:overwriteExisting, which lets you make a choice. By default it would throw an error if one already exists, forcing you to make a choice to either rename the output variables or actually overwrite.