TypeRepresentation:a.pythonTypeRepresentation
  PyFunctionTypeRepresentation
    PyParameterListRepresentation
      PsiElement(Py:LPAR)('(')
      PyNamedParameterTypeRepresentation('a')
        PsiElement(Py:IDENTIFIER)('a')
        PsiElement(Py:COLON)(':')
        PsiWhiteSpace(' ')
        PyReferenceExpression: int
          PsiElement(Py:IDENTIFIER)('int')
        PsiWhiteSpace(' ')
        PsiElement(Py:EQ)('=')
        PsiWhiteSpace(' ')
        PyEllipsisLiteralExpression
          PsiElement(Py:DOT)('.')
          PsiElement(Py:DOT)('.')
          PsiElement(Py:DOT)('.')
      PsiElement(Py:RPAR)(')')
    PsiWhiteSpace(' ')
    PsiElement(Py:RARROW)('->')
    PsiWhiteSpace(' ')
    PyNoneLiteralExpression
      PsiElement(Py:NONE_KEYWORD)('None')