Why does TMemoryStream only implement one version of SetSize method?

https://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/rtl/objpas/classes/classesh.inc?revision=49038&view=markup#l1225

The TStream class has two versions of SetSize method (virtual, overload) - one with a parameter of LongInt type and the other with the Int64 type. Since function is virtual, child classes can override it and can be called from code, but then a version of the SetSize function not implemented for a given platform in the TMemoryStream class can be called.

MichaƂ.
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