syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"defining_opaque_types_and_generators:"}]}
source_snippet:             defining_opaque_types_and_generators: cx
context_before:         TypingMode::Analysis {
context_after:                 .opaque_types_and_coroutines_defined_by(body_def_id),