These functions are meant for use in other parts of the module. You *probably* shouldn't be calling these manually.
If there's a feature missing from the main [ZiplineApi](zipline.md) class, you should open an [issue](https://coastalcommits.com/SeaswimmerTheFsh/PyZipline/issues) (or a [pull request](https://coastalcommits.com/SeaswimmerTheFsh/PyZipline/pulls)).