I have Jenkins pipeline which consists of 2 stages,

I want to execute second stage only on certain condition, e.g. if git branch is not master.

When it was on bash I used to use simple logic: 

```
if [condition] {exit 0} else {stage2 function} fi

```

How is it possible in Jenkins pipeline groovy? 

My Jenkinsfile looks like this - 

```
pipeline {
    agent any
    stages {
        stage ('First') {
            steps {
                echo "First"
            }

            if (env.BRANCH_NAME == 'master') {
                echo 'First stage is enought, exit 0 shoul happened here'
                currentBuild.result = 'SUCCESS'
                return
            } else {
                echo 'Second stage must be executed'
            }

        }

        stage('Second') {
            steps {
                echo "Second"
            }
        }
    }
}

```

..and it doesn't work:
[![enter image description here](https://i.stack.imgur.com/0bpCp.png)](https://i.stack.imgur.com/0bpCp.png)

However, it works as expected in scripted pipeline - 
<https://github.com/kagarlickij/jenkins-pipeline/blob/scripted/Jenkinsfile>