syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // we'll need to emit vptrs from now on.
context_before:             // If we've emitted (fed to `segment_visitor`) a trait that has methods present in the vtable,
context_after:             emit_vptr_on_new_entry |= has_entries;