我正在研究要与Jenkins 2.0一起使用的Jenkinsfile。readMavenPom无法识别该方法。我缺少一些配置以使其可用吗？

我的Jenkinsfile：

    node {
      stage 'Checkout'
      checkout scm
      env.PATH = "${tool 'maven-3'}/bin:${env.PATH}"
      stage 'Build'
      def pom = readMavenPom file: 'pom.xml'
      echo "${pom}"
      sh "mvn -DskipTests=true verify"
    }

运行时，出现以下错误：

java.lang.NoSuchMethodError: No such DSL method 'readMavenPom' found

among
[AWSEBDeployment, archive, bat, build, catchError, checkout, deleteDir,
dir, echo,
emailext, error, fileExists, git, input, isUnix, load, mail, node,
parallel,
properties, pwd, readFile, retry, sh, slackSend, sleep, stage, stash,
step, svn,
timeout, tool, unarchive, unstash, waitUntil, withCredentials, withEnv,
wrap,
writeFile, ws]