syntax_data: {"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"self_desc"}]}
source_snippet:                     self_desc = if let Some(self_ty) = self_ty {
context_before:                     trait_desc = trait_ref.print_trait_sugared(),
context_after:                         format!(" for type `{self_ty}`")