docs: public boolean purgeCache() {
          final SQLiteDatabase db = getDb();
          if (db != null && db.isOpen()) {
              try {
                  db.delete(TABLE, null, null);
                  return true;
              } catch (Exception e) {
                  Log.w(IMapView.LOGTAG, "Error purging the db", e);
                  catchException(e);
              }
          }
          return false;
      }