syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // `Projection(<Self as Trait>::synthetic_assoc_ty, trait_def::opaque)`
context_before:                     // of the default method. This is normally handled by adding an unchecked
context_after:                     // assumption to the `param_env` of the default method. We also separately