'medved'.((1+3).toString)
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Groovy script
  Property selection
    Literal
      PsiElement(string)(''medved'')
    PsiElement(.)('.')
    Parenthesized expression
      PsiElement(()('(')
      Reference expression
        Parenthesized expression
          PsiElement(()('(')
          Additive expression
            Literal
              PsiElement(Integer)('1')
            PsiElement(+)('+')
            Literal
              PsiElement(Integer)('3')
          PsiElement())(')')
        PsiElement(.)('.')
        PsiElement(identifier)('toString')
      PsiElement())(')')