Accept Only Certain Node for input

Hey, I want to create a few nodes, and one is like a “writer” node the input should only accept my other two nodes. How do i make this possible?

If you are creating a table with only one of your custom cells in it, then it makes sense to create a custom port object.

If you want users to provide you with a table that contains several rows with your custom cell, then you can check the columns of the input table in the configure step and reject the table if it does not contain columns of the required type.

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