----- IMPORTANT: -----

add a toString() method to Code, so the user can look at it

treat this (even implicit uses of this) as a CSP variable

Relativize class names in brackets to local package


----- DATAFLOW: -----

Flow for LetExprs

Flow for Brackets
- copies functionality from method and/or class decls


----- USE ASTs INSTEAD OF STRINGS: -----

Make JCTree implement Serializable

Lower for Brackets serializes the stored AST into a string


----- MISC: -----

return inside brackets for statements
- Attr for return sets UNKNOWN ret type for run in enclosing Brackets
