docs: protected void mergeConfiguration(GraphAlgorithmWrappingBase other) {
  		Preconditions.checkNotNull(other);
  
  		parallelism = (parallelism == PARALLELISM_DEFAULT) ? other.parallelism :
  			((other.parallelism == PARALLELISM_DEFAULT) ? parallelism : Math.min(parallelism, other.parallelism));
  	}