syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Form 1: The obligation comes not from the current `impl` nor the `trait` being
context_before:         ty::PredicateKind::Clause(ty::ClauseKind::Projection(proj)) => {
context_after:             // implemented, but rather from a "second order" obligation, where an associated