syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"DstMayHaveSafetyInvariants,"}]}
source_snippet:     DstMayHaveSafetyInvariants,
context_before:     /// The destination type may carry safety invariants.
context_after:     /// `Dst` is larger than `Src`, and the excess bytes were not exclusively uninitialized.