syntax_data: {"ast_node_type":"variable","tokens":[{"end":54,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let place = self.storage_live_binding(
context_before:             PatKind::Binding { mode: BindingMode(ByRef::No, _), var, subpattern: None, .. } => {
context_after:                     block,