bool (*PoolFFI)(CYPool *, JSContextRef, sig::Type *, ffi_type *, void *, JSValueRef);
JSValueRef (*FromFFI)(JSContextRef, sig::Type *, ffi_type *, void *, bool, JSObjectRef);
bool (*PoolFFI)(CYPool *, JSContextRef, sig::Type *, ffi_type *, void *, JSValueRef);
JSValueRef (*FromFFI)(JSContextRef, sig::Type *, ffi_type *, void *, bool, JSObjectRef);