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.

Jakarta Dependency Injection

Mockito mock objects library core API and implementation

Provides utilities for thread management, logging, and futures handling

Provides services for monitoring and retrieving system diagnostic statuses

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