docs: public Map<String, String> persistencePropertiesOverrides(Map<String, String> overridingProperties) {
          if(overridingProperties == null) {
              throw new IllegalArgumentException("the property 'overridingProperties' is not allowed to be null.");
          }
          Map<String, String> overridingProperttiesCopy = new HashMap<>(overridingProperties);
          
          return mergeFilteredMaps(getSystemJavaxPersistenceOverrides(), overridingProperttiesCopy);
      }