syntax_data: {"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"hir::BlockCheckMode::UnsafeBlock(hir::UnsafeSource::UserProvided)"}]}
source_snippet:                 hir::BlockCheckMode::UnsafeBlock(hir::UnsafeSource::UserProvided) => {
context_before:                 }
context_after:                     BlockSafety::ExplicitUnsafe(block.hir_id)