syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"Some(TestBranch::Constant(value,"}]}
source_snippet:                     Some(TestBranch::Constant(value, bits))
context_before:                     let bits = value.eval_bits(self.tcx, self.typing_env());
context_after:                 }