BTreeMap: replace `throw InternalError` with Java Assertions
BTreeMap: replace `throw InternalError` with Java Assertions

olupas/MapDB,mebigfatguy/mapdb,jankotek/mapdb,ringoluo/mapdb,mebigfatguy/mapdb,jankotek/MapDB,SleimanJneidi/mapdb,codeaudit/mapdb,jankotek/MapDB,lamfire/mapdb,morfeo8marc/mapdb,binarytemple/mapdb,sumit784/mapdb,pettermahlen/mapdb,ffjiao/mapdb,hangum/mapdb,jankotek/mapdb,olupas/MapDB,cocosli/mapdb