Deprecate multicomparison save/load functions in favor of pickle

src/spikeinterface/comparison/multicomparisons.py

@@ -1,6 +1,7 @@
 from pathlib import Path
 import json
 import pickle
+import warnings
 
 import numpy as np
 
@@ -180,6 +181,11 @@ def get_agreement_sorting(self, minimum_agreement_count=1, minimum_agreement_cou
         return sorting
 
     def save_to_folder(self, save_folder):
+        warnings.warn(
+            "save_to_folder() is deprecated. You should save and load the multi sorting comparison object using pickle.\n>>> pickle.dump(mcmp, open('mcmp.pkl', 'wb')))))\n>>> mcmp_loaded = pickle.load(open('mcmp.pkl', 'rb'))",
+            DeprecationWarning,
+            stacklevel=2,
+        )
         for sorting in self.object_list:
             assert (
                 sorting.check_if_json_serializable()
@@ -205,6 +211,11 @@ def save_to_folder(self, save_folder):
 
     @staticmethod
     def load_from_folder(folder_path):
+        warnings.warn(
+            "load_from_folder() is deprecated. You should save and load the multi sorting comparison object using pickle.\n>>> pickle.dump(mcmp, open('mcmp.pkl', 'wb')))))\n>>> mcmp_loaded = pickle.load(open('mcmp.pkl', 'rb'))",
+            DeprecationWarning,
+            stacklevel=2,
+        )
         folder_path = Path(folder_path)
         with (folder_path / "kwargs.json").open() as f:
             kwargs = json.load(f)