syntax_data: {"ast_node_type":"function","tokens":[{"end":70,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn equate_const_vids_raw(&self, a: ty::ConstVid, b: ty::ConstVid);
context_before:     fn equate_float_vids_raw(&self, a: ty::FloatVid, b: ty::FloatVid);