Function createStatefulEventStream

createStatefulEventStream<T>(eventType, stateApi): {
    get state(): undefined | T;
    getState(): Promise<T>;
    subscribe(callback): (() => void);
    refresh(): Promise<T>;
}
Create a state-synchronized event stream that combines initial state with events
Type Parameters
- T = any
Parameters
- eventType: string
  The event type for updates
- stateApi: string | (() => Promise<T>)
  API endpoint or function to fetch current state
Returns {
    get state(): undefined | T;
    getState(): Promise<T>;
    subscribe(callback): (() => void);
    refresh(): Promise<T>;
}
Object with subscribe method and current state getter
- get state(): undefined | T
  Get current state synchronously (may be undefined if not loaded)
- getState:function
  - getState(): Promise<T>
  - Get current state asynchronously (waits for initial load)
    
    Returns Promise<T>
- subscribe:function
  - subscribe(callback): (() => void)
  - Subscribe to state changes (includes initial state)
    Parameters
    - callback: ((state) => void)
      (state): void
      Parameters
      state: T
      Returns void
    Returns (() => void)
    - - (): void
      - Returns void
- refresh:function
  - refresh(): Promise<T>
  - Refresh state from API
    
    Returns Promise<T>