syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if self.tcx.sess.at_least_rust_2018() {
context_before:         if cnum == LOCAL_CRATE {
context_after:                 // We add the `crate::` keyword on Rust 2018, only when desired.