@Override
    public void setPluginRegistry(IPluginRegistry pluginRegistry) {
        this.pluginRegistry = pluginRegistry;
    }
@see io.apiman.gateway.engine.policy.IPolicyFactory#setPluginRegistry(io.apiman.gateway.engine.IPluginRegistry)
gateway/engine/core/src/main/java/io/apiman/gateway/engine/policy/PolicyFactoryImpl.java