syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"This"}]}
source_snippet:         This feature is unsafe."),
context_before:         "target specific attributes. (`rustc --print target-features` for details). \
context_after:     unsafe_allow_abi_mismatch: Vec<String> = (Vec::new(), parse_comma_list, [UNTRACKED],