syntax_data: {"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:     if let PatKind::Binding { name, subpattern: None, ty, .. } = pat.kind {
context_before:     }
context_after:         // See if the binding might have been a `const` that was mistyped or out of scope.