syntax_data: {"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"Diag,"}]}
source_snippet:     Diag, DiagCtxt, DiagCtxtHandle, DiagMessage, Diagnostic, ErrorGuaranteed, FatalAbort,
context_before: use rustc_errors::{
context_after:     TerminalUrl, fallback_fluent_bundle,