Power Query Passing FileName into a Table column

[Radoslaw Poprawski]

Hi all,
Please remind me the trick,

in the "name" column i have my file names
in "Data" column I have Tables,

Im trying to pass the filename into tables in Data column
I remember there was a way like so:

But for the life of me im blanked out and cannot remember the trick to it.
can any1 help?

 

[Radoslaw Poprawski]

nevermind I figured it out:

= Table.AddColumn( Custom1,"Data_Origin_Added", each Table.AddColumn([Data], "Data_Origin",(OT) => [Name]))