syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // captured by-ref. This would be correct, except for the case where we have
context_before:             // insert a deref and then peel a deref if the parent and child are both
context_after:             // precise capturing projections, since the inserted deref is to the *beginning*