<!-- Before filing a bug, please consider submitting a pull request with a failing test --> ## Expected Behavior inside a batch load function, `this` should refer to the data loader instance ## Current Behavior `this` is not typed inside the batch load function ## Possible Solution <!-- Not obligatory, but ideally suggest a fix or hypothesis for the bug --> ## Steps to Reproduce attempt to use `this` in a batch loader function, see that typescript complains ## Context my api call gives me back excess properties, so i want to prime my data loader with the excess data inside my batch function.