code: @Override
    protected boolean hasOverflow(FlatRStarTreeNode node) {
      if(node.isLeaf()) {
        return node.getNumEntries() == leafCapacity;
      }
      else if(node.getNumEntries() == node.getCapacity()) {
        node.increaseEntries();
      }
      return false;
    }
docs: Returns true if in the specified node an overflow occurred, false
  otherwise.
  
  @param node the node to be tested for overflow
  @return true if in the specified node an overflow occurred, false otherwise