public void beforeTest(QTestUtil qt) throws Exception {
    for (QTestOptionHandler h : handlers.values()) {
      h.beforeTest(qt);
    }
  }
Provides facilities to invoke {@link QTestOptionHandler}-s.

Enables to dispatch option arguments to a specific option handler.
The option invocation format is '--! qt:&lt;optionName&gt;:&lt;optionArgs&gt;

Please refer to specific implementations of {@link QTestOptionHandler} for more detailed information about them.
itests/util/src/main/java/org/apache/hadoop/hive/ql/qoption/QTestOptionDispatcher.java