{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"target_projection:"}]}
             target_projection: ty::Binder<I, ty::ExistentialProjection<I>>| {
             source_projection: ty::Binder<I, ty::ExistentialProjection<I>>,
                source_projection.item_def_id() == target_projection.item_def_id()