syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"|"}]}
source_snippet:             | PlaceContext::NonMutatingUse(NonMutatingUseContext::Projection) => {
context_before:             PlaceContext::MutatingUse(MutatingUseContext::Projection)
context_after:                 unreachable!("A projection could be a def or a use and must be handled separately")