syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// methods. For example `Sized` or `FusedIterator`.
context_before:     /// Specializing on this trait is allowed because it doesn't have any
context_after:     /// Applies to traits with the `rustc_unsafe_specialization_marker`