syntax_data: {"ast_node_type":"import","tokens":[{"end":75,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Always use types for non-local impls, where types are always
context_before:         if let DefPathData::Impl = key.disambiguated_data.data {
context_after:             // available, and filename/line-number is mostly uninteresting.