# Package org.apache.jmeter.engine.util

Interface Summary
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 Summary
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.