EmptyEmbedder(self) -> None
Assumes you want to completely ignore the output of a
TokenIndexer for some reason, and does
not return anything when asked to embed it.
You should almost never need to use this; normally you would just not use a particular
TokenIndexer. It's only in very rare cases, like simplicity in data processing for language
modeling (where we use just one
TextField to handle input embedding and computing target ids),
where you might want to use this.