Added same catches in submitAll - still...
Nitpick - bye DiskRecord
First draft of adding Serializers to HeapFile
Suppress warnings + extract alloc method
Smells in Record page ammended
Finally moving the code for the root in removeInternal - TEST:

keyDeleted = readKey(i - 1); was missing from the root code !!!
lockInterruptibly()
Nitpick
Read methods moved to RecordsPage from node
max_keys moved to Node - should move to the tree for space efficiency

But maybe impossible if Leafs and Internal nodes have different value types
getMax_keys() --> getMaxKeys() - notice where used