message: [pdsl_core] Make StorageMap::entry private
diff: @@ -298,7 +298,7 @@ where
  ///
  /// The key may be any borrowed form of the map's key type,
  /// but Hash and Eq on the borrowed form must match those for the key type.
  - pub fn entry<Q>(&self, key: &Q) -> Option<&Entry<K, V>>
  + fn entry<Q>(&self, key: &Q) -> Option<&Entry<K, V>>
  where
  K: Borrow<Q>,
  Q: HashAsKeccak256 + Eq
  