Function expect

ts/types/CurrentChatFolders.std.ts:124–135

(
    state: CurrentChatFolders,
    id: ChatFolderId,
    reason: string
  )

  }

  export function expect(
    state: CurrentChatFolders,
    id: ChatFolderId,
    reason: string
  ): CurrentChatFolder {
    const chatFolder = get(state, id);
    strictAssert(
      chatFolder != null,
      `Expected chat folder to exist in state ${id} (${reason})`
    );
    return chatFolder;
  }

  export function at(
    state: CurrentChatFolders,