code: @Override
      public void destroyWorkspace() {
          ensureThreadExistense();
  
          MemoryWorkspace workspace = backingMap.get().get(MemoryWorkspace.DEFAULT_ID);
          //if (workspace != null)
          //workspace.destroyWorkspace();
  
          backingMap.get().remove(MemoryWorkspace.DEFAULT_ID);
      }
docs: This method destroy default workspace, if any