Member pocketmine\block\Block::isSolid (): TL;DR: Don't use this function. Its results are confusing and inconsistent.
Member pocketmine\block\Campfire::$inventory: This was added by mistake. It can't be relied on as the inventory won't be initialized if this block has never been set in the world.
Member pocketmine\block\Campfire::getInventory (): This was added by mistake. It can't be relied on as the inventory won't be initialized if this block has never been set in the world.
Class pocketmine\block\tile\Banner
Class pocketmine\block\tile\Comparator
Class pocketmine\block\tile\DaylightSensor: As per the wiki, this is an old hack to force daylight sensors to get updated every game tick. This is necessary to ensure that the daylight sensor's power output is always up to date with the current world time. It's theoretically possible to implement this without a blockentity, but this is here to ensure that vanilla can understand daylight sensors in worlds created by PM.
Class pocketmine\block\tile\FlowerPot
Class pocketmine\block\tile\GlowingItemFrame
Class pocketmine\block\tile\ItemFrame
Class pocketmine\block\tile\Lectern
Class pocketmine\block\tile\MobHead
Class pocketmine\block\tile\MonsterSpawner
Class pocketmine\block\tile\Note
Class pocketmine\block\tile\Sign
Member pocketmine\data\bedrock\block\upgrade\BlockStateUpgradeSchema::getVersionId (): This is defined by Mojang, and therefore cannot be relied on. Use getSchemaId() instead for internal version management.
Member pocketmine\entity\Entity::despawnFrom (Player $player, bool $send=true): WARNING: This function DOES NOT permanently hide the entity from the player. As soon as the entity or player moves, the player will once again be able to see the entity.
Member pocketmine\entity\Entity::despawnFromAll (): WARNING: This function DOES NOT permanently hide the entity from viewers. As soon as the entity or player moves, viewers will once again be able to see the entity.
Member pocketmine\item\Item::equals (Item $item, bool $checkDamage=true, bool $checkCompound=true)
Class pocketmine\item\LegacyStringToItemParser
Member pocketmine\permission\PermissionManager::getPermissionSubscriptions (string $permission): Superseded by server chat broadcast channels
Member pocketmine\permission\PermissionManager::subscribeToPermission (string $permission, PermissibleInternal $permissible): Superseded by server chat broadcast channels
Member pocketmine\permission\PermissionManager::unsubscribeFromAllPermissions (PermissibleInternal $permissible): Superseded by server chat broadcast channels
Member pocketmine\permission\PermissionManager::unsubscribeFromPermission (string $permission, PermissibleInternal $permissible): Superseded by server chat broadcast channels
Member pocketmine\Server::getPlayerByPrefix (string $name): This method's results are unpredictable. The string "Steve" will return the player named "SteveJobs", until another player named "SteveJ" joins the server, at which point it will return that player instead. Prefer filtering the results of Server::getOnlinePlayers() yourself.
Member pocketmine\utils\Process::kill (int $pid, bool $subprocesses=false)
Member pocketmine\utils\Utils::cloneCallback ()
Member pocketmine\world\World::getChunkPlayers (int $chunkX, int $chunkZ): WARNING: This function has a misleading name. Contrary to what the name might imply, this function DOES NOT return players who are IN a chunk, rather, it returns players who can SEE the chunk.