{"ast_node_type":"import","tokens":[{"end":40,"kind":"keyword","start":0,"text":"use"}]}
    use errors::CfgAccessibleInvalid::*;
fn validate_input<'a>(ecx: &ExtCtxt<'_>, mi: &'a ast::MetaItem) -> Option<&'a ast::Path> {
    match mi.meta_item_list() {