What's the correct way to register and use ConfigurationSerializables?

I found the section in the Configuration API documentation referring to serializing and deserializing custom objects. I made the class I want to se/deserialize extend ConfigurationSerializable, and I have implemented it properly. I made a constructor that accepts a Map<String, Object> and constructs the instance off of that. I then annotated the class with an alias using @SerializableAs(String), and then registered it into
ConfigurationSerialization.registerClass(Class, String) using the class and the alias String.

I went to my config.yml, and wrote out my object's data

Code:

map_border:
  corner1:
    - -30
    - 59
    - -34
  corner2:
    - 30
    - 109
    - 34

Now, I just can't figure out whether I registered it incorrectly, or all the methods I've tried of actually *getting* my deserialized object are incorrect. I've tried getConfig().get(String)/get(String, Object). I just can't find a method. They always return null when I give them what I believe they expect.

Did I register my object incorrectly? How do I get my deserialized object?

(Bukkit version 1.8.8)

 

@HydroPage90 Does this need to be done within the config or can you use another file that is written into and read out of by the code.

 

@Niv-Mizzet I'm not sure if it's strictly necessary for it to be config.yml. But it wouldn't hurt me to make different files

 

@HydroPage90 Is your object serializable? Make sure to implement the interface Serializable.

 

@Niv-Mizzet Wait, really? It has to be java's Serializable? Not ConfigurationSerializable like the documentation says? Why wouldn't the docs mention this. That doesn't sound right

 

How I use it:

make the object:

Code:java

public class ColorTheme implements ConfigurationSerializable {
 
    public static ColorTheme deserialize(Map<String, Object> args) {
        ColorTheme theme = new ColorTheme();
        /*put data from args in your object*/
    }
 
    @Override
    public Map<String, Object> serialize() {
        HashMap<String, Object> args = new HashMap<>();
        /*put data from your object in args*/
        return args;
    }
}

and in your onEnable() (or at least before you are accessing your config file) register it:

Code:java

ConfigurationSerialization.registerClass(ColorTheme.class, "ColorTheme");