syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // FIXME remove this after a couple releases
context_before:     // the spec-complaint C ABI to be used.
context_after:     wasm_c_abi: () = ((), parse_wasm_c_abi, [TRACKED],