# Hide initialization cell [duplicate]

I would like to load a package at the beginning of a notebook. So i put these lines inside an initialization cell:

SetDirectory[NotebookDirectory[]];
<< MyPack
`

Now i would like to make that cell invisible: idealy, a user that will open that notebook will not see that.

If that is not possible, how can i "close" that cell hiding its content as I can do with other cells?