syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"sess.opts.cg.dwarf_version.or(sess.opts.unstable_opts.dwarf_version)"}]}
source_snippet:         sess.opts.cg.dwarf_version.or(sess.opts.unstable_opts.dwarf_version)
context_before:     if let Some(dwarf_version) =
context_after:     {