code: @Nullable
      public final View getView(@NonNull final ItemType item) {
          Condition.INSTANCE.ensureNotNull(item, "The item may not be null");
          return activeViews.get(item);
      }
docs: Returns the view, which is currently used to visualize a specific item.
  
  @param item
  The item, whose view should be returned, as an instance of the generic type ItemType.
  The item may not be null
  @return The view, which is currently used to visualize the given item, as an instance of the
  type ItemType or null, if no such view is currently inflated