syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"ProjectionElem::ConstantIndex"}]}
source_snippet:                 ProjectionElem::ConstantIndex { offset: idx as u64, min_length, from_end: false };
context_before:             let elem =
context_after:             let place = place.clone_project(elem);