docs: public void drop(final Txn<T> txn, final boolean delete) {
      if (SHOULD_CHECK) {
        requireNonNull(txn);
        txn.checkReady();
        txn.checkWritesAllowed();
      }
      if (delete) {
        clean();
      }
      final int del = delete ? 1 : 0;
      checkRc(LIB.mdb_drop(txn.pointer(), ptr, del));
    }