Function drop

packages/ui-default/components/problemconfig/ProblemConfigTree.tsx:36–45

(item)

      return item.subtaskId !== subtaskId;
    },
    drop(item) {
      dispatch({
        type: 'problemconfig/moveTestcases',
        payload: {
          target: subtaskId,
          source: item.subtaskId,
          cases: item.cases,
        },
      });
    },
  }));

  function deleteSubtask() {