syntax_data: {"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // `_1.0` does not appear, but we still need to track it. This is achieved by propagating
context_before:         //
context_after:         // projections from assignments. We recorded an assignment between `_2` and `_1`, so we