syntax_data: {"ast_node_type":"impl","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // resolution failure), then we just insert the impl at the top level of
context_before:         // If the reference itself contains an earlier error (e.g., due to a
context_after:         // the graph and claim that there's no overlap (in order to suppress