syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub description: Option<StaticCow<str>>,
context_before:     /// for example "64-bit Linux (kernel 3.2+, glibc 2.17+)".
context_after:     /// The tier of the target. 1, 2 or 3.