id: test1
  inputs: 
    a: 100
  steps:
    - name: step 1
    - name: step 2
      run: |
        let v = 50;
    - name: step 3
      inputs:
        e: abc
      branches:
        - name: branch 1
          if: $("a") >= 100
          steps:
            - name: branch 1.1
            - name: branch 1.2
        - name: branch 2
          if: $("a") < 100
          steps:
            - name:  branch 2.1
    - name: step 4