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Peach 2.3

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Mutable Attribute

Mutable is used to define if this element, block, or datatype should be fuzzed. The default value is true.

Note
Even when an element is marked as non-mutable it will still be modified as the fuzzer fuzzes the other elements. Marking an element as non-mutable will only disable the mutators that would have operated on that element.
Tip
It is our experience that marking elements as non-mutable leads to missing faults. We recommend not using this attribute unless you really know what your doing and know that the marked alements have already been fuzzed.

Examples

<DataModel name="Header">
  <Number name="ReservedForFutureuse" size="8" mutable="false" />
  <Number size="8" />
  <Number size="8" />
  <Number size="8" />
<DataModel>