From the introduction and section lead-ins:
This document introduces playtest options for two classes, the warlock and the wizard.
At 1st level, a warlock gains the Otherworldly Patron feature. Here are new playtest options for that feature: the Hexblade and the Raven Queen.
At 2nd level, a wizard gains the Arcane Tradition feature. Here is a new playtest option for that feature: Lore Mastery.