syntax_data: {"ast_node_type":"variable","tokens":[{"end":52,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                     if let Some(rhs) = field.place()
context_before:                 for (index, field) in fields.iter_enumerated() {
context_after:                         && let Some(rhs) = self.register_place(rhs)