* Tries to find the proxy with the given URI. Returns null if not found.
*/
SpecObject findProxyFor(EObject element) {
TracingConfiguration config = getTracingConfig();
String uri = EcoreUtil.getURI(element).toString();
ReqIF reqif = ReqIF10Util.getReqIF(config);
AttributeDefinitionString ad = config.getProxyAttribute();
// Iterate SpecObjects and search for existing proxy element
for (SpecObject specObject : reqif.getCoreContent().getSpecObjects()) {
AttributeValue value = ReqIF10Util
.getAttributeValue(specObject, ad);
if (value instanceof AttributeValueString) {
String tmpUrl = TracingConfigurationItemProvider
.getProxyUrlFromValue(((AttributeValueString) value)