syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"ty::BoundConstness::Const"}]}
source_snippet:             ty::BoundConstness::Const => { "const" }
context_before:         let constness = match self.constness {
context_after:             ty::BoundConstness::Maybe => { "[const]" }