syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // NOTE: Creating a new Expr and wrapping a Cast inside of it may be
context_before:                 if let Some(user_ty) = user_ty {
context_after:                     //       inefficient, revisit this when performance becomes an issue.