@Override
    public void apply(ApiResponse response, IPolicyContext context, Object config,
            IPolicyChain<ApiResponse> chain) {
        response.getHeaders().put("Test-Reply", "true");

        chain.doApply(response);
    }
@see io.apiman.gateway.engine.policy.IPolicy#apply(io.apiman.gateway.engine.beans.ApiResponse, io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object, io.apiman.gateway.engine.policy.IPolicyChain)
plugins/test-policy/src/main/java/io/apiman/plugins/test_policy/TestPolicy.java