Completion when using brackets ([]) does not work

[FourierTransformer]

The type needs to be resolved inside the brackets first and then passed to the token list.

It might be able to work by taking what's inside the brackets and passing it into document:type_information_for_tokens to get the type and then somehow using that in the list of tokens. Would also need to handle recursive calls within the brackets.

This along with #28 may need to expand the list of tokens to actually being a type with some additional metadata to help type_information_for_tokens.