Function register

register(
type: string,
factory: Factory | MovableContentRegistry.Lazy,
): () => void
Registers how a kind of content is created, replacing any earlier registration.
Parameters
- type: string
  The content type (IMovable.IContent.getType()).
- factory: Factory | MovableContentRegistry.Lazy
  The factory, or a Lazy that loads it when first needed.
Returns () => void
A function that removes the registration.