Making a transparent mask in eevee

Dose anyone know how to make a transparent mask material like in BI, or if it’s even possible with the current build.

Here is a demo I made in 2.79 in case I’m not making any sense.

MaskDemo.blend (477.7 KB)

You are looking for the “holdout” shader node.

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Thanks for the info, I wasn’t sure on the technical name.