@SuppressFBWarnings(value = "EI_EXPOSE_REP", justification = "sessionVariables is ImmutableMap")
  public Map<String, Object> getSessionVariables() {
    return sessionVariables;
  }
@Test
  public void shouldHandleNullSessionVariables() {
    assertThat(
        new KsqlRequest("sql", SOME_PROPS, Collections.emptyMap(), null, SOME_COMMAND_NUMBER).getSessionVariables(),
        is(Collections.emptyMap()));
  }