I'm using ROS Melodic and Gazebo 9.9.0.

I'm learning ROS and my first robot was a robot with two wheels and a caster wheel. But now I want to use a robot with four wheels and no caster wheel.

With my first robot, I've used libgazeborosdiff_drive.so.

Is there and specific library for a robot with four wheels or can I use the libgazeborosdiff_drive.so?