Working on Formating DSL completion

src/app.py

@@ -17,6 +17,7 @@ from myfasthtml.controls.Layout import Layout
 from myfasthtml.controls.TabsManager import TabsManager
 from myfasthtml.controls.TreeView import TreeView, TreeNode
 from myfasthtml.controls.helpers import Ids, mk
+from myfasthtml.core.dbengine_utils import DataFrameHandler
 from myfasthtml.core.instances import UniqueInstance
 from myfasthtml.icons.carbon import volume_object_storage
 from myfasthtml.icons.fluent_p2 import key_command16_regular
@@ -38,22 +39,6 @@ app, rt = create_app(protect_routes=True,
                      base_url="http://localhost:5003")
 
 
-class DataFrameHandler(BaseRefHandler):
-  def is_eligible_for(self, obj):
-    return isinstance(obj, pd.DataFrame)
-  
-  def tag(self):
-    return "DataFrame"
-  
-  def serialize_to_bytes(self, df) -> bytes:
-    from io import BytesIO
-    import pickle
-    return pickle.dumps(df)
-
-  def deserialize_from_bytes(self, data: bytes):
-    import pickle
-    return pickle.loads(data)
-
 
 def create_sample_treeview(parent):
   """