diff --git a/devchat/ide/__init__.py b/devchat/ide/__init__.py
index dbfd10ad..986fe28c 100644
--- a/devchat/ide/__init__.py
+++ b/devchat/ide/__init__.py
@@ -1,5 +1,7 @@
 from .service import IDEService
+from .types import *
+from .types import __all__ as types_all
 
-__all__ = [
+__all__ = types_all + [
     "IDEService",
 ]
diff --git a/devchat/ide/service.py b/devchat/ide/service.py
index 7afff5c2..ce477e1d 100644
--- a/devchat/ide/service.py
+++ b/devchat/ide/service.py
@@ -97,6 +97,10 @@ def find_type_def_locations(self, abspath: str, line: int, character: int) -> Li
         """
         return [Location.parse_obj(loc) for loc in self._result]
 
+    @rpc_method
+    def find_def_locations(self, abspath: str, line: int, character: int) -> List[Location]:
+        return [Location.parse_obj(loc) for loc in self._result]
+
     @rpc_method
     def ide_name(self) -> str:
         """Returns the name of the IDE.
diff --git a/devchat/ide/types.py b/devchat/ide/types.py
index 01fb463b..c999e53b 100644
--- a/devchat/ide/types.py
+++ b/devchat/ide/types.py
@@ -2,21 +2,47 @@
 
 from pydantic import BaseModel
 
+__all__ = [
+    "Position",
+    "Range",
+    "Location",
+    "SymbolNode",
+    "LocationWithText"
+]
+
 
 class Position(BaseModel):
     line: int  # 0-based
     character: int  # 0-based
 
+    def __repr__(self):
+        return f"Ln{self.line}:Col{self.character}"
+
+    def __hash__(self):
+        return hash(self.__repr__())
+
 
 class Range(BaseModel):
     start: Position
     end: Position
 
+    def __repr__(self):
+        return f"{self.start} - {self.end}"
+
+    def __hash__(self):
+        return hash(self.__repr__())
+
 
 class Location(BaseModel):
     abspath: str
     range: Range
 
+    def __repr__(self):
+        return f"{self.abspath}::{self.range}"
+
+    def __hash__(self):
+        return hash(self.__repr__())
+
 
 class SymbolNode(BaseModel):
     name: str
@@ -29,3 +55,9 @@ class LocationWithText(BaseModel):
     abspath: str
     range: Range
     text: str
+
+    def __repr__(self):
+        return f"{self.abspath}::{self.range}::{self.text}"
+
+    def __hash__(self):
+        return hash(self.__repr__())