IsNextMessage - Haiku

Symbol: IsNextMessage

headers/os/app/MessageQueue.h

bool IsNextMessage(const BMessage* message) const;

src/kits/app/Looper.cpp

&& fDirectTarget->Queue()->IsNextMessage(message)

src/kits/app/Message.cpp

if (direct->Queue()->IsNextMessage(copy) && port_count(port) <= 0) {