diff --git a/src/Ary.php b/src/Ary.php
index 460074d..3e6918c 100644
--- a/src/Ary.php
+++ b/src/Ary.php
@@ -11,8 +11,6 @@
 namespace Salarmehr;
 
 use ArrayAccess;
-use ArrayIterator;
-use CachingIterator;
 use Countable;
 use Illuminate\Support\Collection;
 use IteratorAggregate;
@@ -20,18 +18,10 @@ use JsonSerializable;
 
 class Ary extends Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSerializable
 {
-
-    /**
-     * The items contained in the collection.
-     *
-     * @var array
-     */
-    protected $items = [];
-
     /**
      * Create a new collection.
      *
-     * @param  mixed $items
+     * @param mixed $items
      */
 
     public function __construct()
@@ -46,36 +36,6 @@ class Ary extends Collection implements ArrayAccess, Countable, IteratorAggregat
         $this->items = $items;
     }
 
-    /**
-     * Results array of items from Collection or Arrayable.
-     *
-     * @param  mixed $items
-     * @return array
-     */
-    protected function getArrayableItems($items)
-    {
-        if ($items instanceof self) {
-            return $items->all();
-        }
-        if (method_exists($items, 'toArray')) {
-            return $items->toArray();
-        }
-        if ($items instanceof \JsonSerializable) {
-            return json_decode(json_encode($items), true);
-        }
-        return (array)$items;
-    }
-
-    /**
-     * Get all of the items in the collection.
-     *
-     * @return array
-     */
-    public function all()
-    {
-        return $this->items;
-    }
-
     public function &__get($item)
     {
         return $this->get($item);
@@ -110,17 +70,6 @@ class Ary extends Collection implements ArrayAccess, Countable, IteratorAggregat
         return $array;
     }
 
-    /**
-     * Determine if an item exists at an offset.
-     *
-     * @param  mixed $key
-     * @return bool
-     */
-    public function offsetExists($key)
-    {
-        return array_key_exists($key, $this->items);
-    }
-
     /**
      * Set the item at a given offset.
      *
@@ -167,117 +116,11 @@ class Ary extends Collection implements ArrayAccess, Countable, IteratorAggregat
         return $this->get($key);
     }
 
-    /**
-     * Convert the object into something JSON serializable.
-     *
-     * @return array
-     */
-    public function jsonSerialize()
-    {
-        return $this->all();
-    }
-
-    /**
-     * Get the collection of items as a plain array.
-     *
-     * @return array
-     */
-    public function toArray()
-    {
-        return $this->all();
-    }
-
-    /**
-     * Merge the collection with the given items.
-     *
-     * @param  mixed $items
-     * @return static
-     */
-    public function merge($items)
-    {
-        return new static(array_merge($this->items, $this->getArrayableItems($items)));
-    }
-
-    /**
-     * Get a CachingIterator instance.
-     *
-     * @param  int $flags
-     * @return \CachingIterator
-     */
-    public function getCachingIterator($flags = CachingIterator::CALL_TOSTRING)
-    {
-        return new \CachingIterator($this->getIterator(), $flags);
-    }
-
-    /**
-     * Get an iterator for the items.
-     *
-     * @return \ArrayIterator
-     */
-    public function getIterator()
-    {
-        return new ArrayIterator($this->items);
-    }
-
-    /**
-     * Count the number of items in the collection.
-     *
-     * @return int
-     */
-    public function count()
-    {
-        return count($this->items);
-    }
-
-    /**
-     * Convert the collection to its string representation.
-     *
-     * @return string
-     */
-
-    public function __toString()
-    {
-        return $this->toJson();
-    }
-
-    /**
-     * Get the collection of items as JSON.
-     *
-     * @param  int $options
-     * @return string
-     */
-    public function toJson($options = 0)
-    {
-        return json_encode($this->all(), $options);
-    }
-
-    /**
-     * Get a subset of the items from the given array.
-     *
-     * @param  array|string $keys
-     * @return array
-     */
-    public function only($keys)
-    {
-        return array_intersect_key($this->all(), array_flip((array)$keys));
-    }
-
     public function __isset($name)
     {
         return $this->has($name);
     }
 
-    /**
-     * Determine if an item exists in the collection by key.
-     *
-     * @param  mixed $key
-     * @return bool
-     */
-    public function has($key)
-    {
-        return $this->offsetExists($key);
-    }
-
     /**
      * Get the collection of items as a plain object.
      *
@@ -289,17 +132,10 @@ class Ary extends Collection implements ArrayAccess, Countable, IteratorAggregat
     }
 
     /**
-     * Search the ary for a given value and return the corresponding key if successful.
-     *
-     * @param  mixed $value
-     * @param  bool $strict
-     * @return mixed
+     * Return a subset of current ary as a new ary
+     * @param $item
+     * @return Ary
      */
-    public function search($value, $strict = false)
-    {
-        return array_search($value, $this->items, $strict);
-    }
-
     public function ary($item)
     {
         return new ary($this->get($item));
@@ -309,15 +145,4 @@ class Ary extends Collection implements ArrayAccess, Countable, IteratorAggregat
     {
         $this->offsetUnset($key);
     }
-
-    /**
-     * Unset the item at a given offset.
-     *
-     * @param  string $key
-     * @return void
-     */
-    public function offsetUnset($key)
-    {
-        unset($this->items[$key]);
-    }
 }
\ No newline at end of file