A couple of concrete names from this "plenty" would be a good start... That is, those who read WhatsApp disassembly and did thourough enough review to warrant

A couple of concrete names from this "plenty" would be a good start... That is, those who read WhatsApp disassembly and did thourough enough review to warrant with sufficient confidence not raising any flags. It would also help to know which specific build the were looking at.