Method GetNumStreams

libi2pd/Streaming.h:325–325

			void DeleteStream (std::shared_ptr<Stream> stream);
			bool DeleteStream (uint32_t recvStreamID);
			size_t GetNumStreams () const { return m_Streams.size (); };
			void SetAcceptor (const Acceptor& acceptor);
			void ResetAcceptor ();
			bool IsAcceptorSet () const { return m_Acceptor != nullptr; };