syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // FIXME: Put this back
context_before:         (ty::Param(a_p), ty::Param(b_p)) if a_p.index() == b_p.index() => {
context_after:             //debug_assert_eq!(a_p.name(), b_p.name(), "param types with same index differ in name");