{"ast_node_type":"function","tokens":[{"end":146,"kind":"keyword","start":0,"text":"\"{visibility}{const_literal}{async_literal}{gen_literal}{unsafe_literal}fn"}]}
        "{visibility}{const_literal}{async_literal}{gen_literal}{unsafe_literal}fn {fn_name}{type_params}{params} {ret_type}{where_clause}{body}",
    ast_from_text(&format!(
    ))