syntax_data: {"ast_node_type":"variable","tokens":[{"end":49,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                             if let Ok(byte_str) =
context_before:                             let range = AllocRange { start: offset, size: Size::from_bytes(len) };
context_after:                                 alloc.inner().get_bytes_strip_provenance(&self.tcx(), range)