syntax_data: {"ast_node_type":"other","tokens":[{"end":16,"kind":"keyword","start":0,"text":"unsafe"}]}
source_snippet:         unsafe {
context_before:         // FIXME: Represent the above fact in the trait system somehow.
context_after:             std::mem::transmute::<ty::SymbolName<'tcx>, ty::SymbolName<'_>>(ty::SymbolName::new(