syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"StatementKind::AscribeUserType("}]}
source_snippet:                         StatementKind::AscribeUserType(
context_before:                         ty_source_info,
context_after:                             Box::new((place, UserTypeProjection { base, projs: Vec::new() })),