Add TextChannel.get_thread shortcut helper

discord/channel.py

@@ -589,6 +589,23 @@ class TextChannel(discord.abc.Messageable, discord.abc.GuildChannel, Hashable):
         from .message import PartialMessage
         return PartialMessage(channel=self, id=message_id)
 
+    def get_thread(self, thread_id: int) -> Optional[Thread]:
+        """Returns a thread with the given ID.
+
+        .. versionadded:: 2.0
+
+        Parameters
+        -----------
+        thread_id: :class:`int`
+            The ID to search for.
+
+        Returns
+        --------
+        Optional[:class:`Thread`]
+            The returned thread or ``None`` if not found.
+        """
+        return self.guild.get_thread(thread_id)
+
     async def start_thread(
         self,
         *,