@Override
    public String getTargetRestEndpointURL() {
        return "/taskmanagers/:" + TaskManagerIdPathParameter.KEY + "/metrics";
    }
@Test
    void testUrl() {
        assertThat(taskManagerMetricsHeaders.getTargetRestEndpointURL())
                .isEqualTo("/taskmanagers/:" + TaskManagerIdPathParameter.KEY + "/metrics");
    }