add more return type declare

Author: inhere

src/Traits/ArrayAccessByGetterSetterTrait.php

@@ -25,7 +25,7 @@ trait ArrayAccessByGetterSetterTrait
      * @param   mixed $offset The array offset.
      * @return  boolean  True if the offset exists, false otherwise.
      */
-    public function offsetExists($offset)
+    public function offsetExists($offset): bool
     {
         return property_exists($this, $offset);
     }

src/Traits/ArrayAccessByPropertyTrait.php

@@ -25,7 +25,7 @@ trait ArrayAccessByPropertyTrait
      * @param   mixed $offset The array offset.
      * @return  boolean  True if the offset exists, false otherwise.
      */
-    public function offsetExists($offset)
+    public function offsetExists($offset): bool
     {
         return property_exists($this, $offset);
     }

src/Traits/ObjectPoolTrait.php

@@ -66,7 +66,7 @@ public static function use($class, \Closure $handler)
      * @param string|\stdClass $class
      * @return \SplStack
      */
-    public static function getStack($class)
+    public static function getStack($class): \SplStack
     {
         $class = \is_string($class) ? $class : \get_class($class);
 
@@ -82,7 +82,7 @@ public static function getStack($class)
      * @return int
      * @throws \InvalidArgumentException
      */
-    public static function count($class = null)
+    public static function count($class = null): int
     {
         if ($class) {
             if (!isset(self::$pool[$class])) {