Guava is a suite of core and expanded libraries that include

A core Netty module that provides high-level channel handlers for protocol implementations and network applications.

Netty transport implementation using Linux epoll for efficient I/O on native platforms.

Mockito mock objects library core API and implementation

OSGi Core Release 8, Interfaces and Classes for use in compiling bundles

JUnit Jupiter is the API for writing tests using JUnit 5.

SLF4J Reload4j Provider