class
Holder
Entity blueprint/staging area for collecting components before entity creation. Create with EntityStore.REGISTRY.newHolder(), add components with addComponent(componentType, component), then pass to store.addEntity(holder, AddReason).
Methods
Holder addComponent()
Adds component to blueprint. Params: (ComponentType type, Component component). Returns this for chaining.
void ensureComponent()
Ensures component exists with default value. Params: (ComponentType type)