syntax_data: {"ast_node_type":"other","tokens":[{"end":27,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         //   DB index of 1.
context_before:         //   early-bound parameter and `'b` is a late-bound parameter with a
context_after:         // - If we replace `'a` with `'x` from the input, it too will have