syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"prefix_projections:"}]}
source_snippet:     prefix_projections: &[HirProjection<'tcx>],
context_before:     projections: &[PlaceElem<'tcx>],
context_after: ) -> impl Iterator<Item = PlaceElem<'tcx>> {