syntax_data: {"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // We have two cases to worry about here:
context_before:         let generics = self.tcx.generics_of(impl_def_id);
context_after:         // 1. We're printing a nested item inside of an impl item, like an inner