syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"ProjectedUserTypesOp::PushUserType"}]}
source_snippet:                 ProjectedUserTypesOp::PushUserType { base } => {
context_before:             match op {
context_after:                     projections.push(UserTypeProjection { base, projs: vec![] })