chore: add WideSampler for MUTAG

Author: rememberYou

examples/mutag.py

@@ -35,7 +35,12 @@
     # generated for the entities without hashing as MUTAG is a short KG.
     walkers=[
         HALKWalker(
-            2, None, n_jobs=2, random_state=RANDOM_STATE, md5_bytes=None
+            2,
+            None,
+            n_jobs=2,
+            sampler=WideSampler(),
+            random_state=RANDOM_STATE,
+            md5_bytes=None,
         )
     ],
     verbose=1,