return explicit libzfs types

Author: gronke

iocage/lib/Config/Type/ZFS.py

@@ -146,4 +146,5 @@ def __init__(
 
     @property
     def dataset(self) -> libzfs.ZFSDataset:
-        return self.resource.dataset
+        dataset: libzfs.ZFSDataset = self.resource.dataset
+        return dataset

iocage/lib/Datasets.py

@@ -237,6 +237,7 @@ def _get_or_create_dataset(
         else:
             target_pool = self.root.pool
 
+        dataset: libzfs.ZFSDataset
         dataset_name = f"{root_dataset_name}/{name}"
         try:
             dataset = self.zfs.get_dataset(dataset_name)
@@ -251,5 +252,4 @@ def _get_or_create_dataset(
             dataset.mount()
 
         self._datasets[dataset_name] = dataset
-
         return dataset

iocage/lib/Release.py

@@ -676,7 +676,8 @@ def snapshot(
             existing_snapshot = None
 
         self.dataset.snapshot(snapshot_name)
-        return self.zfs.get_snapshot(snapshot_name)
+        snapshot: libzfs.ZFSSnapshot = self.zfs.get_snapshot(snapshot_name)
+        return snapshot
 
     def _update_hbsd_jail(
         self,