public String getDependentPolicyValue(String policyName) {
String value = accessor.getDevicePolicyValue(policyName);
DependencyContext context = expressionContext.getDependencyContext();
if (context.isTrackingDependencies()) {
DevicePolicyDependency dependency = new DevicePolicyDependency(
policyName, value);
context.addDependency(dependency);
}
return value;