syntax_data: {"ast_node_type":"variable","tokens":[{"end":80,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let (offset1, field1, offset2, field2) = if offset1 <= offset2 {
context_before:                 // The fields might be in opposite order.
context_after:                     (offset1, field1, offset2, field2)