syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"Some(LangItem::MetaSized)"}]}
source_snippet:             Some(LangItem::MetaSized) => SizedTraitKind::MetaSized,
context_before:             Some(LangItem::Sized) => SizedTraitKind::Sized,
context_after:             _ => return false,