AFW.Util.csvWriter creates CSV streams.

A typical usecase is to export items. If you need column titles other then the item names you had to use "column objects" and do something like this:

columns: [
    {
        label: "my custom col title",
        value: function(doc) doc.my_item
    },
    ...
]

This now can be done more simple using a string as col config dividing label and value with a pipe:

columns: [
    "my custom col title|my_item".
    ...
]