What is the name of the design pattern used by matterjs

the design seem to:

• separate data into types
• each type is associated with a class
• methods are static, they do not get inherited by instanciated objects
• instances of a class (type) can only be manipulated by the static methods provided by the class associated with their type

the classes purpose seem to only be namespacing the methods/procedures used by their instances

the approach seem procedural

const object = new TypeA();
TypeA.doSomething(object);
TypeA.doSomethingElse(object);

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• The Project Github Repo
• Documentation