* debug: heap fragmentation stat
* Rework method detection
- return check integral type as a result of detection instead of method type
- type-tagging instead of enable_if
* fix alias
* typo
* only need one bool_type instance
* Move heap debug into HeapStats header
- don't show fragmentation stats on the first call
- prettify fragmentation display
- pack function params into helper struct
- naming
* pass external flag instead
* add missing prototypes