syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                 if !destination.projection.is_empty() {
context_before:                 // in the case of box expr there is no such check.
context_after:                     this.local_decls.push(LocalDecl::new(expr.ty, expr.span));