add some PHPStan-specific callable prototypes

src/pocketmine/scheduler/AsyncPool.php

@@ -68,7 +68,10 @@ class AsyncPool{
 	/** @var int[] */
 	private $workerLastUsed = [];
 
-	/** @var \Closure[] */
+	/**
+	 * @var \Closure[]
+	 * @phpstan-var (\Closure(int $workerId) : void)[]
+	 */
 	private $workerStartHooks = [];
 
 	public function __construct(Server $server, int $size, int $workerMemoryLimit, \ClassLoader $classLoader, \ThreadedLogger $logger){
@@ -100,6 +103,8 @@ class AsyncPool{
 	 * The signature should be `function(int $worker) : void`
 	 *
 	 * This function will call the hook for every already-running worker.
+	 *
+	 * @phpstan-param \Closure(int $workerId) : void $hook
 	 */
 	public function addWorkerStartHook(\Closure $hook) : void{
 		Utils::validateCallableSignature(function(int $worker) : void{}, $hook);
@@ -111,6 +116,8 @@ class AsyncPool{
 
 	/**
 	 * Removes a previously-registered callback listening for workers being started.
+	 *
+	 * @phpstan-param \Closure(int $workerId) : void $hook
 	 */
 	public function removeWorkerStartHook(\Closure $hook) : void{
 		unset($this->workerStartHooks[spl_object_hash($hook)]);

src/pocketmine/scheduler/ClosureTask.php

@@ -38,11 +38,15 @@ use pocketmine\utils\Utils;
  */
 class ClosureTask extends Task{
 
-	/** @var \Closure */
+	/**
+	 * @var \Closure
+	 * @phpstan-var \Closure(int) : void
+	 */
 	private $closure;
 
 	/**
 	 * @param \Closure $closure Must accept only ONE parameter, $currentTick
+	 * @phpstan-param \Closure(int) : void $closure
 	 */
 	public function __construct(\Closure $closure){
 		Utils::validateCallableSignature(function(int $currentTick) : void{}, $closure);

src/pocketmine/utils/Internet.php

@@ -183,6 +183,7 @@ class Internet{
 	 * @param string[]      $extraHeaders extra headers to send as a plain string array
 	 * @param array         $extraOpts    extra CURLOPT_* to set as an [opt => value] map
 	 * @param callable|null $onSuccess    function to be called if there is no error. Accepts a resource argument as the cURL handle.
+	 * @phpstan-param (callable(resource) : void)|null $onSuccess
 	 *
 	 * @return array a plain array of three [result body : string, headers : array[], HTTP response code : int]. Headers are grouped by requests with strtolower(header name) as keys and header value as values
 	 *

src/pocketmine/utils/Utils.php

@@ -454,6 +454,7 @@ class Utils{
 	 * @param string[]      $extraHeaders extra headers to send as a plain string array
 	 * @param array         $extraOpts    extra CURLOPT_* to set as an [opt => value] map
 	 * @param callable|null $onSuccess    function to be called if there is no error. Accepts a resource argument as the cURL handle.
+	 * @phpstan-param (callable(resource) : void)|null $onSuccess
 	 *
 	 * @return array a plain array of three [result body : string, headers : array[], HTTP response code : int]. Headers are grouped by requests with strtolower(header name) as keys and header value as values
 	 *