syntax_data: {"ast_node_type":"variable","tokens":[{"end":98,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                             let range = AllocRange { start: offset, size: Size::from_bytes(len) };
context_before:                         Some(GlobalAlloc::Memory(alloc)) => {
context_after:                             if let Ok(byte_str) =