syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"ty::ExistentialPredicate::Projection(target_projection)"}]}
source_snippet:                 ty::ExistentialPredicate::Projection(target_projection) => {
context_before:                 // it with b_ty's projection.
context_after:                     let hr_target_projection = bound.rebind(target_projection);