syntax_data: {"ast_node_type":"variable","tokens":[{"end":46,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let place = match mutability {
context_before:             ExprKind::RawBorrow { mutability, arg } => {
context_after:                     hir::Mutability::Not => this.as_read_only_place(block, arg),