code: private WekaThreadSafeScorer quickSwitch(UUID modelId, WekaThreadSafeScorer newWekaThreadSafeScorer) {
          try { // quick switch - do not do anything inside for performance reasons!!
              reloadModelsLock.writeLock().lock();
              return wekaThreadSafeScorers.put(modelId, newWekaThreadSafeScorer);
          } finally {
              reloadModelsLock.writeLock().unlock();
          }
      }
docs: Switches the {@link com.feedzai.fos.impl.weka.WekaScorer} used for the model with the given UUID.
  
  @param modelId                 The UUID of the model whose scorer to switch.
  @param newWekaThreadSafeScorer The score to switch to.
  @return The previous scorer associated to the given UUID.