syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"VtblSegment::TraitOwnEntries"}]}
source_snippet:                 VtblSegment::TraitOwnEntries { trait_ref: vtable_principal, emit_vptr } => {
context_before:                 }
context_after:                     vptr_offset +=