When your ADTs code interacts with another that doesn't use ADTs, you typically write wrappers. A good idea is to provide wrappers for common libraries (you can suggest a new one to this list):

• libc
• Linux syscalls

The astprinter seems to ignore indentation within multi line strings (descriptions).
E.g. when there's an example GraphQL query with proper indentation within the description the printer falls short printing the indentation properly.