Describes functions that have a mutable storage-class-specifier.
This element is present when the function is mutable. it has two mandatory attributes; name and value (see example below).
See ISO/IEC 14882:2003(E) 7.1.1 Storage class specifiers [dcl.stc]
The mutable specifier can be applied only to names of class data members and cannot be applied to names declared const or static, and cannot be applied to reference members.
Given this code:
class X { mutable const int* p; };
Then function X::p would have the element:
<cxxFunctionStorageClassSpecifierMutable/>
If the mandatory attributes are present they must be set thus:
<cxxFunctionStorageClassSpecifierMutable name="mutable" value="mutable"/>