syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":".opaque_types_and_coroutines_defined_by(body_def_id),"}]}
source_snippet:                 .opaque_types_and_coroutines_defined_by(body_def_id),
context_before:             defining_opaque_types_and_generators: cx
context_after:         }