return fFunctionContext.resolveFunction(new QName(_ns, _funcName), 0) != null;
}
};
XPathContext xpathSupport = new XPathContext(extProvider);
contexts[0] = xpathSupport;
xpathSupport.setVarStack(new JAXPVariableStack(fVariableContext));
// If item is null, then we will create a a Dummy contextNode
final XObject xobj;
if (contextItem instanceof Node)
{