@Override
    public IExportWriter writePolicyDef(PolicyDefinitionBean policyDef) {
        writeCheck(GlobalElementsEnum.PolicyDefinitions);
        writePojo(policyDef);
        return this;
    }
@see io.apiman.manager.api.exportimport.write.IExportWriter#writePolicyDef(io.apiman.manager.api.beans.policies.PolicyDefinitionBean)
manager/api/export-import/src/main/java/io/apiman/manager/api/exportimport/json/JsonExportWriter.java