syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // is used throughout rustc, has problems distributing the entropy from the high bits, so reversing
context_before: // more entropy in the low bits than the high bits. The reason this matters is that `FxHash`, which
context_after: // the order would lead to a large number of collisions and thus far worse performance.