public static ApiKeys apiKeyFrom(NetworkReceive networkReceive) {
        return RequestHeader.parse(networkReceive.payload().duplicate()).apiKey();
    }
Assert that a future raises an expected exception cause type. Return the exception cause
if the assertion succeeds; otherwise raise AssertionError.

@param future The future to await
@param exceptionCauseClass Class of the expected exception cause
@param <T> Exception cause type parameter
@return The caught exception cause
clients/src/test/java/org/apache/kafka/test/TestUtils.java