syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // will have DB index of 1. Not quite what we want. So we apply
context_before:         // imagination). Basically the 'x will have DB index of 2 and 'b
context_after:         // the instantiation to the *contents* of the trait reference,