syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// If this is a nested rigid projection, such as
context_before:     /// Looks at the item bounds of the projection or opaque type.
context_after:     /// `<<T as Tr1>::Assoc as Tr2>::Assoc`, consider the item bounds