Interface StateRegistryService

interface StateRegistryService {
    deregister(stateOrName: StateOrName): StateDeclaration[];
    getState(
        stateOrName: StateOrName,
        base?: StateOrName,
    ): StateDeclaration | null;
    getStates(): StateDeclaration[];
    onStatesChanged(
        listener: (
            event: "registered" | "deregistered",
            states: StateDeclaration[],
        ) => void,
    ): () => void;
    register(stateDefinition: StateDeclaration): StateDeclaration;
    root(): StateDeclaration;
}