From 343c22e21802fa19d44cc0fff1a0d8c6f1b07244 Mon Sep 17 00:00:00 2001
From: Erez Sh <erezshin@gmail.com>
Date: Tue, 17 Aug 2021 15:00:38 +0300
Subject: [PATCH] NotImplemented -> NotImplmementedError

---
 lark/indenter.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/lark/indenter.py b/lark/indenter.py
index a4bbb24..1a9e587 100644
--- a/lark/indenter.py
+++ b/lark/indenter.py
@@ -74,31 +74,31 @@ class Indenter(PostLex, ABC):
     @property
     @abstractmethod
     def NL_type(self) -> str:
-        return NotImplemented
+        raise NotImplementedError()
 
     @property
     @abstractmethod
     def OPEN_PAREN_types(self) -> List[str]:
-        return NotImplemented
+        raise NotImplementedError()
 
     @property
     @abstractmethod
     def CLOSE_PAREN_types(self) -> List[str]:
-        return NotImplemented
+        raise NotImplementedError()
 
     @property
     @abstractmethod
     def INDENT_type(self) -> str:
-        return NotImplemented
+        raise NotImplementedError()
 
     @property
     @abstractmethod
     def DEDENT_type(self) -> str:
-        return NotImplemented
+        raise NotImplementedError()
 
     @property
     @abstractmethod
     def tab_len(self) -> int:
-        return NotImplemented
+        raise NotImplementedError()
 
 ###}