syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"MultiSpan,"}]}
source_snippet:     MultiSpan, Subdiagnostic, pluralize,
context_before:     Applicability, Diag, DiagArgValue, DiagCtxtHandle, Diagnostic, EmissionGuarantee, Level,
context_after: };