==================
try command
==================

foo:
    TRY
        RUN echo $v
    FINALLY
        SAVE ARTIFACT /foo
    END

---

    (source_file
      (target
        name: (identifier)
        (block
          (try_command
            body: (block
              (run_command
                command: (shell_fragment)))
            finally: (block
              (save_artifact_command
                src: (string
                  (unquoted_string))))))))

