syntax_data: {"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"rustc_allow_incoherent_impl,"}]}
source_snippet:         rustc_allow_incoherent_impl,
context_before:         rustc_allow_const_fn_unstable,
context_after:         rustc_allowed_through_unstable_modules,