Method debugString

src/microReticulum/Transport.h:125–130

			bool _cached = false;
#ifndef NDEBUG
			inline std::string debugString() const {
				std::string dump;
				dump = "PacketEntry: destination_hash=" + _destination_hash.toHex() +
					" sent_at=" + std::to_string(_sent_at);
				return dump;
			}
#endif
		};
		using PacketTable = std::map<Bytes, PacketEntry>;