syntax_data: {"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":".auto_traits()"}]}
source_snippet:             .auto_traits()
context_before:         let a_auto_traits: FxIndexSet<DefId> = a_data
context_after:             .chain(a_data.principal_def_id().into_iter().flat_map(|principal_def_id| {