Registering your Requirement

Registering a Requirement is pretty straight forward.

There are multiple ways you can do this, I like to keep things organized so I'll show my method. You are free to do as you like, as long as the outcome is the same.

1. Create a new class, called ModRequirements. I like to put this in the init package, as we need to call its method during mod initialization later.
2. Make a new void register() method.
3. Inside the method, call the API method RequirementRegistry.register(String type, Class<? extends Requirement> clazz).

-- MUST KNOW ABOUT REQUIREMENTS --

Each Requirement has a dedicated String, its type. It's like an identifier, and should be unique to that Requirement.
Every Requirement also has its dedicated screen, as previously mentioned.

4. Your class should look something like this:

public class ModRequirements {
    public static void register() {
        RequirementRegistry.register("blocks_broken", BlocksBrokenRequirement.class);
        // More Requirements to come
    }
}

5. Now let's call the method during mod initialization in your main mod class, or the CommonClass in MultiLoader's case, here are some examples:
   

NeoForge

    public MyAddon(IEventBus modEventBus) {
        NeoForge.EVENT_BUS.register(this);
        ModRequirements.register()
    }

MultiLoader

    public static void init() {
        ModRequirements.register();
    }

Now your Requirement is registered. However, it's not ready to go just yet.