Linters: cast_to_specific_SNodeType should exclude casts from Object

[alexanderpann]

Example: context.session object [ "myNode" ] returns an object but contains a node. IMO, the Java-style cast is acceptable in this case.
As a workaround to satisfy the linter, I can only type: node<> myNode = context.session object [ "myNode" ] as SNode and than do the cast.

[alexanderpann]

A fix doesn't seem to be possible at the moment because the necessary typesystem information is not available.