Changes

Summary

1. Fix return types (#2419) (commit: 622e0fb) (details)

Commit 622e0fbfaa599bb4f33e6739981bc2a83c90f115 by noreply Fix return types (#2419) (commit: 622e0fb)
	src/main/java/net/dv8tion/jda/internal/entities/EntityBuilder.java (diff)
	src/main/java/net/dv8tion/jda/internal/entities/ActivityImpl.java (diff)