Friker/alg-vis — comment on commit 3740c1d352906324c94166ba9b62857f54181216
File: src/algvis/unionfind/UnionFindButtons.java line 57
By kuk0:

see how this is done in MeldablePQButtons
+ methods meld and chooseHeaps in BinomialHeap
(maybe this could be generalized and reused)