EVP_KDF_CTX_gettable_params
const OSSL_PARAM *EVP_KDF_CTX_gettable_params(EVP_KDF_CTX *ctx);
|| !TEST_ptr(gettableparams = EVP_KDF_CTX_gettable_params(kctx)))
if (!TEST_ptr(gettables = EVP_KDF_CTX_gettable_params(kctx))