syntax_data: {"ast_node_type":"other","tokens":[{"end":28,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub env: StaticCow<str>,
context_before:     /// Environment name to use for conditional compilation (`target_env`). Defaults to "".
context_after:     /// ABI name to distinguish multiple ABIs on the same OS and architecture. For instance, `"eabi"`