Now that we have run our import update, let's go back to load the 119th CES/CEF node and confirm that the Headquarters City is now reading Fargo instead of FARGO. Loading that node does indeed show that our
hq_city value is now Fargo. Our tamper plugin worked successfully.
Notice that the Mail City is also in uppercase. You could now go back to your tamper plugin configuration screen and add this same plugin to the Mail City field so that it would affect those values as well.
There are many more examples of Feeds Tamper plugins and other related Feeds Tamper documentation on its project documentation page via ...