TypeRepresentation:a.pythonTypeRepresentation
  PyFunctionTypeRepresentation
    PyParameterTypeListRepresentation
      PsiElement(Py:LPAR)('(')
      PyEllipsisLiteralExpression
        PsiElement(Py:DOT)('.')
        PsiElement(Py:DOT)('.')
        PsiElement(Py:DOT)('.')
      PsiElement(Py:RPAR)(')')
    PsiWhiteSpace(' ')
    PsiElement(Py:RARROW)('->')
    PsiWhiteSpace(' ')
    PyNoneLiteralExpression
      PsiElement(Py:NONE_KEYWORD)('None')