Can someone explain how this works?

I'm working with the plugin for individual column filtering, and there's a part of the code that I don't understand:

$.fn.dataTableExt.oApi.fnGetColumnData = function ( oSettings, iColumn, bUnique, bFiltered, bIgnoreEmpty ) {

The explanation in the comments states that oSettings is always the last argument passed in, yet how can it be, if it is the first argument in the function?

Furthermore, the only thing being passed in is the index of the current column, (0-5), and somehow, those values are in fact making it into the second parameter, iColumn, where they belong.

What am I missing here? How is it possible that passing one argument would skip over the first one in the function definition, and land in the proper place like that?

To confuse me even more, I noticed that oSettings somehow appears to have the correct information in it, even though it's not being passed in.

Can someone clarify this for me? There is obviously something going on here that I'm not aware of...

Thanks,

Kenny