code: @Override
      public void constructCache(DefaultSolverScope solverScope) {
          long childSize = childEntitySelector.getSize();
          if (childSize > (long) Integer.MAX_VALUE) {
              throw new IllegalStateException("The selector (" + this
                      + ") has a childEntitySelector (" + childEntitySelector
                      + ") with childSize (" + childSize
                      + ") which is higher than Integer.MAX_VALUE.");
          }
          cachedEntityList = new ArrayList<>((int) childSize);
          childEntitySelector.iterator().forEachRemaining(cachedEntityList::add);
          logger.trace("    Created cachedEntityList: size ({}), entitySelector ({}).",
                  cachedEntityList.size(), this);
      }
docs: ************************************************************************