syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"Applicability,"}]}
source_snippet:     Applicability, Diag, DiagArgValue, DiagCtxtHandle, Diagnostic, EmissionGuarantee, Level,
context_before: use rustc_errors::{
context_after:     MultiSpan, Subdiagnostic, pluralize,