syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // If we haven't already passed through a backwards-incompatible node,
context_before:                 | ScopeData::Remainder(_) => {
context_after:                     // then check if we are passing through one now and record it if so.