syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"ProjectAndUnifyResult::Holds(mut"}]}
source_snippet:                         ProjectAndUnifyResult::Holds(mut subobligations) => {
context_before:                     match project::poly_project_and_unify_term(self, &project_obligation) {
context_after:                             'compute_res: {