syntax_data: {"ast_node_type":"function","tokens":[{"end":100,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet: fn symbol_name_provider<'tcx>(tcx: TyCtxt<'tcx>, instance: Instance<'tcx>) -> ty::SymbolName<'tcx> {
context_before: // correct symbol name of instances from upstream crates.
context_after:     let symbol_name = compute_symbol_name(tcx, instance, || {