| Interface | Description | 
|---|---|
| ConfigMergabilityIndicator | 
 Interface that gives a hint about the merge policy to apply between Samplers and Config elements 
 | 
| NoConfigMerge | 
 Implement this method-less interface to indicate that this ConfigElement should not be merged. 
 | 
| NoThreadClone | 
 Implement this method-less interface to indicate your test element should not
 be cloned for each thread in a test run. 
 | 
| Class | Description | 
|---|---|
| CompoundVariable | 
 CompoundFunction. 
 | 
| ReplaceFunctionsWithStrings | 
 Transforms strings into variable references (in spite of the name, which
 suggests the opposite!) 
 | 
| ReplaceStringWithFunctions | 
 Replaces a String containing functions with their Function properties equivalent, example:
 ${__time()}_${__threadNum()}_${__machineName()} will become a FunctionProperty of
 a CompoundVariable containing  3 functions 
 | 
| SimpleVariable | |
| UndoVariableReplacement | 
 Replaces ${key} by value extracted from
  
JMeterVariables if any | 
| ValueReplacer | 
 Perform replacement of ${variable} references. 
 | 
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