syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":".filter(|decl|"}]}
source_snippet:             .filter(|decl| !decl.ignore_for_traits)
context_before:             .map_or_else(|| [].iter(), |l| l.field_tys.iter())
context_after:             .map(|decl| {