syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"\"whether"}]}
source_snippet:         "whether the stable interface is being built"),
context_before:     build_sdylib_interface: bool = (false, parse_bool, [UNTRACKED],
context_after:     cf_protection: CFProtection = (CFProtection::None, parse_cfprotection, [TRACKED],