Add bound method get_media_group() (#593)

* Bound method - get_media_group()

* Update message.py

Co-authored-by: Dan <14043624+delivrance@users.noreply.github.com>

pyrogram/types/messages_and_media/message.py

@@ -706,6 +706,33 @@ class Message(Object, Update):
         else:
             return f"https://t.me/c/{utils.get_channel_id(self.chat.id)}/{self.message_id}"
 
+    async def get_media_group(self) -> List["types.Message"]:
+        """Bound method *get_media_group* of :obj:`~pyrogram.types.Message`.
+        
+        Use as a shortcut for:
+        
+        .. code-block:: python
+            client.get_media_group(
+                chat_id=message.chat.id,
+                message_id=message.message_id
+            )
+            
+        Example:
+            .. code-block:: python
+                message.get_media_group()
+                
+        Returns:
+            List of :obj:`~pyrogram.types.Message`: On success, a list of messages of the media group is returned.
+            
+        Raises:
+            ValueError: In case the passed message id doesn't belong to a media group.
+        """
+
+        return await self._client.get_media_group(
+            chat_id=self.chat.id,
+            message_id=self.message_id
+        )
+
     async def reply_text(
         self,
         text: str,