sample:
  model:
    origin: ORSO test complex resolution
    stack: air | 10 ( Si 70 | Fe 70 ) | ss1 | (ss1 in Fe) | ((ss2 | ss3) | 3 (ss1 | ss2) ) | ((((ss4 200))) in air ) | Si
    sub_stacks:
      ss1:
        repetitions: 2
        stack: ss2 | ss3
      ss2:
        repetitions: 1
        sequence:
          - {thickness: 2.0, material: Si}
          - {thickness: 5.0, material: Ti}
      ss3:
        repetitions: 1
        sequence:
          - {thickness: 3.0, material: copper}
          - {thickness: 1.0, material: mixin}
      ss4:
        sub_stack_class: FunctionTwoElements
        material1: Ni
        material2: Ti
        function: x
    materials:
      copper:
        formula: Cu
      Fe:
        formula: Fe[57]
        mass_density: 7.0
    composits:
      mixin:
        composition:
          copper: 0.5
          Si: 0.5
