org.apache.jmeter.threads

## Interface TestCompilerHelper

- All Known Implementing Classes:
    AbstractThreadGroup, CriticalSectionController, ForeachController, GenericController, IfController, IncludeController, InterleaveControl, LoopController, ModuleController, OnceOnlyController, PostThreadGroup, ProxyControl, RandomController, RandomOrderController, RecordingController, RunTime, SetupThreadGroup, SwitchController, TestFragmentController, ThreadGroup, ThroughputController, TransactionController, WhileController

      public interface TestCompilerHelper

  Bug 53796 - TestCompiler uses static Set which can grow huge This interface is a means to allow the pair data to be saved with the parent instance, thus allowing it to be garbage collected when the thread completes. This uses a bit more memory, as each controller test element includes the data structure to contain the child element. However, there is no need to store the parent element.
  Since:
    2.8

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `addTestElementOnce(TestElement child)` Add child test element only if it has not already been added.

- - ### Method Detail

    - #### addTestElementOnce

          boolean addTestElementOnce(TestElement child)

      Add child test element only if it has not already been added.

      Only for use by TestCompiler.

      Parameters:
        `child` - the `TestElement` to be added
      Returns:
        `true` if the child was added

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