syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // Drop this exception once there is a stable attribute to suppress the
context_before:         // FIXME(https://github.com/rust-lang/rust/issues/77425):
context_after:         // const item mutation lint for a single specific const only. Something