Added class method DataPacket->canBeBatched()

src/pocketmine/network/mcpe/RakLibInterface.php

@@ -211,7 +211,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 				$pk = $packet->__encapsulatedPacket;
 			}
 
-			if(!$immediate and !$needACK and $packet::NETWORK_ID !== ProtocolInfo::BATCH_PACKET
+			if(!$immediate and !$needACK and $packet->canBeBatched()
 				and Network::$BATCH_THRESHOLD >= 0
 				and strlen($packet->buffer) >= Network::$BATCH_THRESHOLD){
 				$this->server->batchPackets([$player], [$packet], true);

src/pocketmine/network/mcpe/protocol/BatchPacket.php

@@ -31,6 +31,10 @@ class BatchPacket extends DataPacket{
 
 	public $payload;
 
+	public function canBeBatched() : bool{
+		return false;
+	}
+
 	public function decode(){
 		$this->payload = $this->getString();
 	}

src/pocketmine/network/mcpe/protocol/DataPacket.php

@@ -40,6 +40,10 @@ abstract class DataPacket extends BinaryStream{
 		return $this::NETWORK_ID;
 	}
 
+	public function canBeBatched() : bool{
+		return true;
+	}
+
 	abstract public function encode();
 
 	abstract public function decode();

src/pocketmine/network/mcpe/protocol/LoginPacket.php

@@ -44,6 +44,10 @@ class LoginPacket extends DataPacket{
 
 	public $clientData = [];
 
+	public function canBeBatched() : bool{
+		return false;
+	}
+
 	public function decode(){
 		$this->protocol = $this->getInt();