syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // generating, we also are taking that field by value. Peel off a deref,
context_before:             // the child captures a field by ref, then for the by-move body we're
context_after:             // since a layer of ref'ing has now become redundant.