syntax_data: {"ast_node_type":"import","tokens":[{"end":74,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // variant, since we use the maximum offset to calculate size.
context_before:             // variant's own fields), then it'll implicitly be counted towards the size of the
context_after:             //    (side-note: I know this is a bit problematic given upvars placement, etc).