How to unlock the "Set Num Cells" node in the node graph?

Hello!
I’ve been trying to follow this tutorial, however on the third picture under “Set Grids” the author uses a function called “Set Num Cells” and I don’t have it in my editor. I’ve tried enabling the Niagara Fluids plugin and setting the source filtering to show all and unchecked the “Library Only” box but I still can’t find it.
Does anyone know how to unlock those functions?
Thank you for your help.
SG

For anyone who gets stuck here, Set Num Cells is a member function of Grid2D Collection types.

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