public VplsConfig getVplsWithName(String name) {
        return vplss().stream()
                      .filter(vpls -> vpls.name().equals(name))
                      .findFirst()
                      .orElse(null);
    }
@Test
    public void getVplsWithName() {
        assertNotNull("Configuration for VPLS not found",
                      vplsAppConfig.getVplsWithName(VPLS1));
        assertNull("Unexpected configuration for VPLS found",
                   vplsAppConfig.getVplsWithName(VPLS2));
    }