syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// that have `Self` as their self type, instead of all implied predicates.
context_before:     /// Filter to only the supertraits of trait predicates, i.e. only the predicates
context_after:     pub fn filter_only_self(mut self) -> Self {