syntax_data: {"ast_node_type":"variable","tokens":[{"end":69,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let (Rvalue::Use(Operand::Copy(place) | Operand::Move(place))
context_before:     for (_, rvalue, _) in ssa.assignments(body) {
context_after:         | Rvalue::CopyForDeref(place)) = rvalue