syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:     if tcx.is_conditionally_const(parent_impl_def_id) {
context_before:     // it cannot be const in fewer cases than the parent impl).
context_after:         if !tcx.is_conditionally_const(specializing_impl_def_id) {