for (MyClass c in [1,2,3]) {doo}
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Groovy script
  For statement
    PsiElement(for)('for')
    PsiWhiteSpace(' ')
    PsiElement(()('(')
    In clause
      Parameter
        Modifiers
          <empty list>
        Type element
          Reference element
            PsiElement(identifier)('MyClass')
        PsiWhiteSpace(' ')
        PsiElement(identifier)('c')
      PsiWhiteSpace(' ')
      PsiElement(in)('in')
      PsiWhiteSpace(' ')
      Generalized list
        PsiElement([)('[')
        Literal
          PsiElement(Integer)('1')
        PsiElement(,)(',')
        Literal
          PsiElement(Integer)('2')
        PsiElement(,)(',')
        Literal
          PsiElement(Integer)('3')
        PsiElement(])(']')
    PsiElement())(')')
    PsiWhiteSpace(' ')
    Block statement
      Open block
        PsiElement({)('{')
        Reference expression
          PsiElement(identifier)('doo')
        PsiElement(})('}')