class: GalaxyWorkflow
inputs:
  optional_int_with_default:
    type: int
    default: 1
    optional: true
outputs:
  out:
    outputSource: integer_default/out_file1
steps:
  integer_default:
    tool_id: integer_default
    tool_state:
      input1: 0
      input2: 0
    in:
      input3:
        source: optional_int_with_default