diff --git a/deepdiff/operator.py b/deepdiff/operator.py
index 6ecc1918..b6bfd775 100644
--- a/deepdiff/operator.py
+++ b/deepdiff/operator.py
@@ -1,16 +1,17 @@
 import re
-from typing import Any, Optional, List, TYPE_CHECKING
 from abc import ABCMeta, abstractmethod
+from typing import Any, TYPE_CHECKING
 from deepdiff.helper import convert_item_or_items_into_compiled_regexes_else_none
 
 if TYPE_CHECKING:
     from deepdiff import DeepDiff
+    from deepdiff.model import DiffLevel
 
 
 class BaseOperatorPlus(metaclass=ABCMeta):
 
     @abstractmethod
-    def match(self, level) -> bool:
+    def match(self, level: "DiffLevel") -> bool:
         """
         Given a level which includes t1 and t2 in the tree view, is this operator a good match to compare t1 and t2?
         If yes, we will run the give_up_diffing to compare t1 and t2 for this level.
@@ -18,7 +19,7 @@ def match(self, level) -> bool:
         pass
 
     @abstractmethod
-    def give_up_diffing(self, level, diff_instance: "DeepDiff") -> bool:
+    def give_up_diffing(self, level: "DiffLevel", diff_instance: "DeepDiff") -> bool:
         """
         Given a level which includes t1 and t2 in the tree view, and the "distance" between l1 and l2.
         do we consider t1 and t2 to be equal or not. The distance is a number between zero to one and is calculated by DeepDiff to measure how similar objects are.
@@ -36,15 +37,17 @@ def normalize_value_for_hashing(self, parent: Any, obj: Any) -> Any:
 
 
 class BaseOperator:
+    regex_paths: list[re.Pattern[str]] | None
+    types: list[type] | None
 
-    def __init__(self, regex_paths:Optional[List[str]]=None, types:Optional[List[type]]=None):
+    def __init__(self, regex_paths: list[str] | None = None, types: list[type] | None = None):
         if regex_paths:
             self.regex_paths = convert_item_or_items_into_compiled_regexes_else_none(regex_paths)
         else:
             self.regex_paths = None
         self.types = types
 
-    def match(self, level) -> bool:
+    def match(self, level: "DiffLevel") -> bool:
         if self.regex_paths:
             for pattern in self.regex_paths:
                 matched = re.search(pattern, level.path()) is not None
@@ -56,16 +59,16 @@ def match(self, level) -> bool:
                     return True
         return False
 
-    def give_up_diffing(self, level, diff_instance) -> bool:
+    def give_up_diffing(self, level: "DiffLevel", diff_instance: "DeepDiff") -> bool:
         raise NotImplementedError('Please implement the diff function.')
 
 
 class PrefixOrSuffixOperator:
 
-    def match(self, level) -> bool:
+    def match(self, level: "DiffLevel") -> bool:
         return level.t1 and level.t2 and isinstance(level.t1, str) and isinstance(level.t2, str)
 
-    def give_up_diffing(self, level, diff_instance) -> bool:
+    def give_up_diffing(self, level: "DiffLevel", diff_instance: "DeepDiff") -> bool:
         t1 = level.t1
         t2 = level.t2
         return t1.startswith(t2) or t2.startswith(t1)