"java.lang.NoSuchMethodError: No such DSL method 'when' found among steps" is shown if I want to use the when directive. This way making impossible to work with Multibranch SCM projects.

example:

```
podTemplate(
    label: 'jenkins-jenkins-agent', cloud: 'kubernetes', namespace: 'default',
    yaml: """    
  spec:
      hostAliases:
      - ip: xx.xxx.xxx.xx
        hostnames:
        - "xxxxx"
        - "xxxx"
""",
    nodeSelector: 'Nodegroup=xxxx',
    envVars : [
        envVar(key: 'ECR_REPO', value: 'dff/staging/jenkins'),
        envVar(key: 'ECR_ENDPOINT', value: 'xxxxxxxx'),
        envVar(key: 'CLUSTER_NAME', value: 'xxxxxx'),
        envVar(key: 'BUILD_REPO', value: 'cloud-jenkins'),
        envVar(key: 'K8S_YAML_REPO', value: 'cloud-k8s-apps'),
        envVar(key: 'BUILD_NUMBER', value: "${BUILD_NUMBER}"),
        envVar(key: 'BRANCH_NAME', value: "${BRANCH_NAME}"),
        envVar(key: 'AWS_DEFAULT_REGION', value: 'us-east-2'),
        secretEnvVar(key: 'AWS_ACCESS_KEY_ID', secretName: 'aws-secret', secretKey: 'AWS_ACCESS_KEY_ID'),  
        secretEnvVar(key: 'AWS_SECRET_ACCESS_KEY', secretName: 'aws-secret', secretKey: 'AWS_SECRET_ACCESS_KEY')
    ],
    containers: [
        containerTemplate(
            name: 'unzip',
            image: 'xxxxxx',
            ttyEnabled: true,
            command: 'sleep',
            args: '9999'
        )
    ],
    volumes: [
        configMapVolume(configMapName: 'docker-config', mountPath: '/root/.docker')
    ],
) {
    node('jenkins-jenkins-agent') {
        stage('Preparation') {
            when

            container('unzip') {
                git branch: 'staging', url: 'https://socgit.advantest.com/bitbucket/scm/acs-datalake/cloud-jenkins.git', credentialsId: 'xxxx'
                sh """
                    git branch -D ${BRANCH_NAME} || true
            """
            }
        }
    }
}
```
 

Is there any other way to develop Multibranch SCM pipelines using the kubernetes plugin??