Update src/zarr/abc/numcodec.py

Co-authored-by: Max Jones <14077947+maxrjones@users.noreply.github.com>

Author: d-v-b

src/zarr/abc/numcodec.py

@@ -49,6 +49,11 @@ def decode(self, buf: Any, out: Any | None = None) -> Any: ...
         """
 
     def get_config(self) -> Any: ...
+        """
+        Return a dictionary holding configuration parameters for this
+        codec. Must include an 'id' field with the codec identifier. All
+        values must be compatible with JSON encoding.
+        """
 
     @classmethod
     def from_config(cls, config: Any) -> Self: ...