@Override
    protected void doApply(ApiResponse response, IPolicyContext context, ConfigBean config,
            IPolicyChain<ApiResponse> chain) {
        response.getHeaders().put(config.getResponseHeader(), "true"); //$NON-NLS-1$
        super.doApply(response, context, config, chain);
    }
@see io.apiman.gateway.engine.policies.AbstractMappedPolicy#doApply(io.apiman.gateway.engine.beans.ApiResponse, io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object, io.apiman.gateway.engine.policy.IPolicyChain)
plugins/config-policy/src/main/java/io/apiman/plugins/config_policy/ConfigPolicy.java