syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"kind:"}]}
source_snippet:                     kind: hir::ExprKind::Cast(..),
context_before:                 let is_from_as_cast = if let hir::Node::Expr(hir::Expr {
context_after:                     span: cast_span,