code: public SplitBrainMergePolicy getMergePolicy(String className) {
          if (className == null) {
              throw new InvalidConfigurationException("Class name is mandatory!");
          }
          return getOrPutIfAbsent(mergePolicyMap, className, policyConstructorFunction);
      }
docs: Resolves the {@link SplitBrainMergePolicy} class by its classname.
  
  @param className the merge policy classname to resolve
  @return the resolved {@link SplitBrainMergePolicy} class
  @throws InvalidConfigurationException when the classname could not be resolved