syntax_data: {"ast_node_type":"variable","tokens":[{"end":40,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let suggestion_str: String =
context_before:             // fully explicit. i.e. we'll need to suggest reference patterns for this.
context_after:                 implicit_deref_mutbls.clone().map(|mutbl| mutbl.ref_prefix_str()).collect();