Operation ordering not works - Springfox Swagger2

SwaggerConfig.java

import static com.google.common.base.Predicates.or;
import static springfox.documentation.builders.PathSelectors.regex;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.chemaxon.version.VersionInfo;
import com.google.common.base.Predicate;

import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger.web.OperationsSorter;
import springfox.documentation.swagger.web.UiConfiguration;
import springfox.documentation.swagger.web.UiConfigurationBuilder;

@Configuration
public class SwaggerConfig {

    @Bean
    public Docket api() {

        return new Docket(DocumentationType.SWAGGER_2)
                .forCodeGeneration(true)
                .select()
                    .paths(apiPaths())
                    .build()
                .useDefaultResponseMessages(false)
                .apiInfo(apiInfo())
                .ignoredParameterTypes(groovy.lang.MetaClass.class);
    }

    @Bean
    public UiConfiguration uiConfig() {
        return UiConfigurationBuilder
                .builder()
                .operationsSorter(OperationsSorter.METHOD)
                .build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder().title("DB Web Services").version(VersionInfo.getDisplayVersion())
                .description("Molecule database webservice implementation").build();
    }

    private Predicate<String> apiPaths() {
        return or(regex("/rest-v1/.*"));
    }

}