PyFile:EmptySuperclassList.py
  PyClass: A
    PsiElement(Py:CLASS_KEYWORD)('class')
    PsiWhiteSpace(' ')
    PsiElement(Py:IDENTIFIER)('A')
    PyArgumentList
      PsiElement(Py:LPAR)('(')
      PsiElement(Py:RPAR)(')')
    PsiElement(Py:COLON)(':')
    PsiWhiteSpace(' ')
    PyStatementList
      PyPassStatement
        PsiElement(Py:PASS_KEYWORD)('pass')