[FIX #230] There was an warning from clang about an unused-function:...
[FIX #230] There was an warning from clang about an unused-function: intervalDistance. Although the function it self was used it has resided inside an anoynmous namespace WITHIN A HEADER file. That was the reason, when ever one included the header file a NEW anonymous namespace was generated which INDEED led to the unused function. However moving this helper function into the private implementation everything is right now.
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